1
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Wei S, Earl SK, Lin J, Kou SS, Yuan XC. Active sorting of orbital angular momentum states of light with a cascaded tunable resonator. Light Sci Appl 2020; 9:10. [PMID: 32025293 PMCID: PMC6987156 DOI: 10.1038/s41377-020-0243-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Revised: 12/23/2019] [Accepted: 12/25/2019] [Indexed: 05/14/2023]
Abstract
The orbital angular momentum (OAM) of light has been shown to be useful in diverse fields ranging from astronomy and optical trapping to optical communications and data storage. However, one of the primary impediments preventing such applications from widespread adoption is the lack of a straightforward and dynamic method to sort incident OAM states without altering the states. Here, we report a technique that can dynamically filter individual OAM states and preserve the incident OAM states for subsequent processing. Although the working principle of this technique is based on resonance, the device operation is not limited to a particular wavelength. OAM states with different wavelengths can resonate in the resonator without any additional modulation other than changing the length of the cavity. Consequently, we are able to demonstrate a reconfigurable OAM sorter that is constructed by cascading such optical resonators. This approach does not require specially designed components and is readily amenable to integration into potential applications.
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Affiliation(s)
- Shibiao Wei
- Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology, Shenzhen University, Shenzhen, 518060 China
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science (LIMS), La Trobe University, Victoria, 3086 Australia
- School of Engineering, RMIT University, Melbourne, Victoria, 3001 Australia
| | - Stuart K. Earl
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science (LIMS), La Trobe University, Victoria, 3086 Australia
- School of Engineering, RMIT University, Melbourne, Victoria, 3001 Australia
| | - Jiao Lin
- Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology, Shenzhen University, Shenzhen, 518060 China
- School of Engineering, RMIT University, Melbourne, Victoria, 3001 Australia
- School of Physics, The University of Melbourne, Tin Alley, Melbourne, Victoria, 3010 Australia
| | - Shan Shan Kou
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science (LIMS), La Trobe University, Victoria, 3086 Australia
| | - Xiao-Cong Yuan
- Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology, Shenzhen University, Shenzhen, 518060 China
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2
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Wei S, Si G, Malek M, Earl SK, Du L, Kou SS, Yuan X, Lin J. Toward broadband, dynamic structuring of a complex plasmonic field. Sci Adv 2018; 4:eaao0533. [PMID: 29868639 PMCID: PMC5983914 DOI: 10.1126/sciadv.aao0533] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 04/20/2018] [Indexed: 05/23/2023]
Abstract
The ability to tailor a coherent surface plasmon polariton (SPP) field is an important step toward many new opportunities for a broad range of nanophotonic applications. Previously, both scanning a converging SPP spot and designing SPP profiles using an ensemble of spots have been demonstrated. SPPs, however, are normally excited by intense, coherent light sources, that is, lasers. Hence, interference between adjacent spots is inevitable and will affect the overall SPP field distributions. We report a reconfigurable and wavelength-independent platform for generating a tailored two-dimensional (2D) SPP field distribution by considering the coherent field as a whole rather than as individual spots. With this new approach, the inherent constraints in a 2D coherent field distribution are revealed. Our design approach works not only for SPP waves but also for other 2D wave systems such as surface acoustic waves.
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Affiliation(s)
- Shibiao Wei
- Nanophotonics Research Centre, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology, Shenzhen University, Shenzhen 518060, China
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria 3086, Australia
- School of Engineering, RMIT University, Melbourne, Victoria 3001, Australia
| | - Guangyuan Si
- School of Engineering, RMIT University, Melbourne, Victoria 3001, Australia
| | - Michael Malek
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria 3086, Australia
| | - Stuart K. Earl
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria 3086, Australia
- School of Engineering, RMIT University, Melbourne, Victoria 3001, Australia
| | - Luping Du
- Nanophotonics Research Centre, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology, Shenzhen University, Shenzhen 518060, China
| | - Shan Shan Kou
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria 3086, Australia
| | - Xiaocong Yuan
- Nanophotonics Research Centre, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology, Shenzhen University, Shenzhen 518060, China
| | - Jiao Lin
- Nanophotonics Research Centre, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology, Shenzhen University, Shenzhen 518060, China
- School of Engineering, RMIT University, Melbourne, Victoria 3001, Australia
- School of Physics, University of Melbourne, Tin Alley, Melbourne, Victoria 3010, Australia
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3
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Balaur E, Sadatnajafi C, Kou SS, Lin J, Abbey B. Continuously Tunable, Polarization Controlled, Colour Palette Produced from Nanoscale Plasmonic Pixels. Sci Rep 2016; 6:28062. [PMID: 27312072 PMCID: PMC4911588 DOI: 10.1038/srep28062] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Accepted: 05/31/2016] [Indexed: 11/18/2022] Open
Abstract
Colour filters based on nano-apertures in thin metallic films have been widely studied due to their extraordinary optical transmission and small size. These properties make them prime candidates for use in high-resolution colour displays and high accuracy bio-sensors. The inclusion of polarization sensitive plasmonic features in such devices allow additional control over the electromagnetic field distribution, critical for investigations of polarization induced phenomena. Here we demonstrate that cross-shaped nano-apertures can be used for polarization controlled color tuning in the visible range and apply fundamental theoretical models to interpret key features of the transmitted spectrum. Full color transmission was achieved by fine-tuning the periodicity of the apertures, whilst keeping the geometry of individual apertures constant. We demonstrate this effect for both transverse electric and magnetic fields. Furthermore we have been able to demonstrate the same polarization sensitivity even for nano-size, sub-wavelength sets of arrays, which is paramount for ultra-high resolution compact colour displays.
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Affiliation(s)
- Eugeniu Balaur
- Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Australia
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science (LIMS), La Trobe University, Victoria 3086, Australia
| | - Catherine Sadatnajafi
- Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Australia
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science (LIMS), La Trobe University, Victoria 3086, Australia
| | - Shan Shan Kou
- Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Australia
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science (LIMS), La Trobe University, Victoria 3086, Australia
| | - Jiao Lin
- School of Engineering, RMIT University, Melbourne, Victoria 3001, Australia
| | - Brian Abbey
- Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Australia
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science (LIMS), La Trobe University, Victoria 3086, Australia
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4
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Kou SS, Yuan G, Wang Q, Du L, Balaur E, Zhang D, Tang D, Abbey B, Yuan XC, Lin J. On-chip photonic Fourier transform with surface plasmon polaritons. Light Sci Appl 2016; 5:e16034. [PMID: 30167145 PMCID: PMC6062422 DOI: 10.1038/lsa.2016.34] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Revised: 09/30/2015] [Accepted: 10/19/2015] [Indexed: 05/23/2023]
Abstract
The Fourier transform (FT), a cornerstone of optical processing, enables rapid evaluation of fundamental mathematical operations, such as derivatives and integrals. Conventionally, a converging lens performs an optical FT in free space when light passes through it. The speed of the transformation is limited by the thickness and the focal length of the lens. By using the wave nature of surface plasmon polaritons (SPPs), here we demonstrate that the FT can be implemented in a planar configuration with a minimal propagation distance of around 10 μm, resulting in an increase of speed by four to five orders of magnitude. The photonic FT was tested by synthesizing intricate SPP waves with their Fourier components. The reduced dimensionality in the minuscule device allows the future development of an ultrafast on-chip photonic information processing platform for large-scale optical computing.
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Affiliation(s)
- Shan Shan Kou
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science (LIMS), La Trobe University, Melbourne, VIC 3086, Australia
- Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Australia
- School of Physics, The University of Melbourne, VIC 3010, Australia
| | - Guanghui Yuan
- Centre for Disruptive Photonic Technologies, Nanyang Technological University, Singapore 637371, Singapore
| | - Qian Wang
- Institute of Materials Research and Engineering, A*STAR, 3 Research Link, Singapore 117602, Singapore
| | - Luping Du
- Nanophotonics Research Centre, Shenzhen University & Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Eugeniu Balaur
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science (LIMS), La Trobe University, Melbourne, VIC 3086, Australia
- Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Australia
| | - Daohua Zhang
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Dingyuan Tang
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Brian Abbey
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science (LIMS), La Trobe University, Melbourne, VIC 3086, Australia
- Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Australia
| | - Xiao-Cong Yuan
- Nanophotonics Research Centre, Shenzhen University & Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Jiao Lin
- School of Physics, The University of Melbourne, VIC 3010, Australia
- Nanophotonics Research Centre, Shenzhen University & Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
- School of Engineering, RMIT University, Melbourne, VIC 3001, Australia
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5
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Du L, Kou SS, Balaur E, Cadusch JJ, Roberts A, Abbey B, Yuan XC, Tang D, Lin J. Broadband chirality-coded meta-aperture for photon-spin resolving. Nat Commun 2015; 6:10051. [PMID: 26628047 PMCID: PMC4686760 DOI: 10.1038/ncomms10051] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Accepted: 10/28/2015] [Indexed: 12/02/2022] Open
Abstract
The behaviour of light transmitted through an individual subwavelength aperture becomes counterintuitive in the presence of surrounding ‘decoration', a phenomenon known as the extraordinary optical transmission. Despite being polarization-sensitive, such an individual nano-aperture, however, often cannot differentiate between the two distinct spin-states of photons because of the loss of photon information on light-aperture interaction. This creates a ‘blind-spot' for the aperture with respect to the helicity of chiral light. Here we report the development of a subwavelength aperture embedded with metasurfaces dubbed a ‘meta-aperture', which breaks this spin degeneracy. By exploiting the phase-shaping capabilities of metasurfaces, we are able to create specific meta-apertures in which the pair of circularly polarized light spin-states produces opposite transmission spectra over a broad spectral range. The concept incorporating metasurfaces with nano-apertures provides a venue for exploring new physics on spin-aperture interaction and potentially has a broad range of applications in spin-optoelectronics and chiral sensing. Nano-apertures cannot distinguish between distinct spin-states of photons because of information loss upon light-aperture interaction. Here, Du et al. report a subwavelength aperture integrated with metasurfaces which breaks spin degeneracy and produces opposite transmission spectra over a broad spectral range.
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Affiliation(s)
- Luping Du
- Nanophotonics Research Centre, Shenzhen University &Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.,School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore.,School of Physics, The University of Melbourne, Tin Alley, Melbourne, Victoria 3010, Australia
| | - Shan Shan Kou
- School of Physics, The University of Melbourne, Tin Alley, Melbourne, Victoria 3010, Australia.,Department of Chemistry and Physics, La Trobe Institute for Molecular Science (LIMS), La Trobe University, Melbourne, Victoria 3086, Australia.,Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Australia
| | - Eugeniu Balaur
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science (LIMS), La Trobe University, Melbourne, Victoria 3086, Australia.,Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Australia
| | - Jasper J Cadusch
- School of Physics, The University of Melbourne, Tin Alley, Melbourne, Victoria 3010, Australia
| | - Ann Roberts
- School of Physics, The University of Melbourne, Tin Alley, Melbourne, Victoria 3010, Australia
| | - Brian Abbey
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science (LIMS), La Trobe University, Melbourne, Victoria 3086, Australia.,Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Australia
| | - Xiao-Cong Yuan
- Nanophotonics Research Centre, Shenzhen University &Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Dingyuan Tang
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Jiao Lin
- Nanophotonics Research Centre, Shenzhen University &Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.,School of Physics, The University of Melbourne, Tin Alley, Melbourne, Victoria 3010, Australia.,School of Electrical and Computer Engineering, RMIT University, Melbourne, Victoria 3001, Australia
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Lin J, Wang Q, Yuan G, Du L, Kou SS, Yuan XC. Mode-matching metasurfaces: coherent reconstruction and multiplexing of surface waves. Sci Rep 2015; 5:10529. [PMID: 25995072 PMCID: PMC4440216 DOI: 10.1038/srep10529] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Accepted: 04/17/2015] [Indexed: 11/25/2022] Open
Abstract
Metasurfaces are promising two-dimensional metamaterials that are engineered to provide unique properties or functionalities absent in naturally occurring homogeneous surfaces. Here, we report a type of metasurface for tailored reconstruction of surface plasmon waves from light. The design is based on an array of slit antennas arranged in a way that it matches the complex field distribution of the desired surface plasmon wave. The approach is generic so that one can readily create more intricate designs that selectively generate different surface plasmon waves through simple variation of the wavelength or the polarization state of incident light. The ultra-thin metasurface demonstrated in this paper provides a versatile interface between the conventional free-space optics and a two-dimensional platform such as surface plasmonics.
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Affiliation(s)
- Jiao Lin
- 1] Institute of Micro &Nano Optics, Shenzhen University, Shenzhen, 518060, China [2] School of Electrical and Computer Engineering, RMIT University, Melbourne, Victoria 3001, Australia [3] School of Physics, University of Melbourne, VIC 3010, Australia
| | - Qian Wang
- Institute of Materials Research and Engineering, A*STAR, Singapore 117602, Singapore
| | - Guanghui Yuan
- Centre for Disruptive Photonic Technologies, Nanyang Technological University, Singapore 637371, Singapore
| | - Luping Du
- Institute of Micro &Nano Optics, Shenzhen University, Shenzhen, 518060, China
| | - Shan Shan Kou
- School of Physics, University of Melbourne, VIC 3010, Australia
| | - Xiao-Cong Yuan
- Institute of Micro &Nano Optics, Shenzhen University, Shenzhen, 518060, China
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7
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Sheppard CJR, Kou SS, Lin J, Sharma M, Barbastathis G. Temporal reshaping of two-dimensional pulses. Opt Express 2014; 22:32016-32025. [PMID: 25607169 DOI: 10.1364/oe.22.032016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
An analytic study of complete cylindrical focusing of pulses in two dimensions is presented, and compared with the analogous three-dimensional case of focusing over a complete sphere. Such behavior is relevant for understanding the limiting performance of ultrafast, planar photonic and plasmonic devices. A particular spectral distribution is assumed that contains finite energy. Separate ingoing and outgoing pulsed waves are considered, along with the combination that would be generated in free space by an ingoing wave. It is shown that for the two dimensional case, in order to produce a temporally symmetrical pulse at the focus, an asymmetric pulse must be launched. A symmetrical outgoing pulse is generated from a source with asymmetric time behavior, or an anti-symmetric input pulse. These results are very different from the corresponding three-dimensional case, and imply fundamental limitations on the performance of ultrafast, tightly focused, two-dimensional devices.
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8
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Kou SS, Sheppard CJR, Lin J. Calculation of the volumetric diffracted field with a three-dimensional convolution: the three-dimensional angular spectrum method. Opt Lett 2013; 38:5296-5298. [PMID: 24322241 DOI: 10.1364/ol.38.005296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The first Rayleigh-Sommerfeld diffraction formula is treated in an exact form as a three-dimensional (3D) convolution in the spatial domain. Therefore, a 3D Fourier transform can be employed to convert the 3D diffracted electromagnetic field to the reciprocal space without approximations, which we call the 3D angular spectrum (3D-AS) method. It is also demonstrated that if evanescent waves are neglected, the 3D-AS method can be readily implemented numerically, with the results in good agreement with theoretical predictions.
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9
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Abstract
An angular spectrum representation in three dimensions is used to develop three-dimensional Fourier forms of the first and second Rayleigh-Sommerfeld diffraction formulae and the Kirchhoff diffraction formula. For forward-propagating waves, these reduce to three-dimensional Fourier representations for diffraction in the forward half-space.
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10
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Sheppard CJR, Kou SS, Depeursinge C. Reconstruction in interferometric synthetic aperture microscopy: comparison with optical coherence tomography and digital holographic microscopy. J Opt Soc Am A Opt Image Sci Vis 2012; 29:244-250. [PMID: 22472753 DOI: 10.1364/josaa.29.000244] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
It is shown that the spatial frequencies recorded in interferometric synthetic aperture microscopy do not correspond to exact backscattering [as they do in unistatic synthetic aperture radar (SAR)] and that the reconstruction process based on SAR is therefore based on an approximation. The spatial frequency response is developed based on the three-dimensional coherent transfer function approach and compared with that in optical coherence tomography and digital holographic microscopy.
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Affiliation(s)
- Colin J R Sheppard
- Optical Bioimaging Laboratory, Division of Bioengineering, National University of Singapore, Singapore.
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11
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Cotte Y, Toy FM, Arfire C, Kou SS, Boss D, Bergoënd I, Depeursinge C. Realistic 3D coherent transfer function inverse filtering of complex fields. Biomed Opt Express 2011; 2:2216-30. [PMID: 21833359 PMCID: PMC3149520 DOI: 10.1364/boe.2.002216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2011] [Revised: 06/29/2011] [Accepted: 06/30/2011] [Indexed: 05/02/2023]
Abstract
We present a novel technique for three-dimensional (3D) image processing of complex fields. It consists in inverting the coherent image formation by filtering the complex spectrum with a realistic 3D coherent transfer function (CTF) of a high-NA digital holographic microscope. By combining scattering theory and signal processing, the method is demonstrated to yield the reconstruction of a scattering object field. Experimental reconstructions in phase and amplitude are presented under non-design imaging conditions. The suggested technique is best suited for an implementation in high-resolution diffraction tomography based on sample or illumination rotation.
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Affiliation(s)
- Yann Cotte
- Ecole Polytechnique Fédérale de Lausanne (EPFL), Microvision and Microdiagnostics Group (MVD), CH-1015 Lausanne,
Switzerland
| | - Fatih M. Toy
- Ecole Polytechnique Fédérale de Lausanne (EPFL), Microvision and Microdiagnostics Group (MVD), CH-1015 Lausanne,
Switzerland
| | - Cristian Arfire
- Ecole Polytechnique Fédérale de Lausanne (EPFL), Microvision and Microdiagnostics Group (MVD), CH-1015 Lausanne,
Switzerland
| | - Shan Shan Kou
- Ecole Polytechnique Fédérale de Lausanne (EPFL), Microvision and Microdiagnostics Group (MVD), CH-1015 Lausanne,
Switzerland
| | - Daniel Boss
- Ecole Polytechnique Fédérale de Lausanne (EPFL), Laboratory of Neuroenergetics and Cellular Dynamics (LNDC), CH-1015 Lausanne,
Switzerland
| | - Isabelle Bergoënd
- Ecole Polytechnique Fédérale de Lausanne (EPFL), Microvision and Microdiagnostics Group (MVD), CH-1015 Lausanne,
Switzerland
| | - Christian Depeursinge
- Ecole Polytechnique Fédérale de Lausanne (EPFL), Microvision and Microdiagnostics Group (MVD), CH-1015 Lausanne,
Switzerland
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Kou SS, Waller L, Barbastathis G, Marquet P, Depeursinge C, Sheppard CJR. Quantitative phase restoration by direct inversion using the optical transfer function. Opt Lett 2011; 36:2671-3. [PMID: 21765504 DOI: 10.1364/ol.36.002671] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Quantitative phase recovery of phase objects is achieved by a direct inversion using the defocused weak object transfer function. The presented method is noniterative and is based on partially coherent principles. It also takes into account the optical properties of the system and gives the phase of the object directly. The proposed method is especially suitable for application to weak phase objects, such as live and unstained biological samples but, surprisingly, has also been shown to work with comparatively strong phase objects.
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Affiliation(s)
- Shan Shan Kou
- Optical Bioimaging Laboratory, Division of Bioengineering, National University of Singapore (NUS), 7 Engineering Drive 1, 117576, Singapore
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13
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Lin J, Yuan XC, Kou SS, Sheppard CJR, Rodríguez-Herrera OG, Dainty JC. Direct calculation of a three-dimensional diffracted field. Opt Lett 2011; 36:1341-1343. [PMID: 21499350 DOI: 10.1364/ol.36.001341] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We present an approach to calculating the complex amplitude of a three-dimensional (3D) diffracted light field in the paraxial approximation based on a 3D Fourier transform. Starting from the Huygens-Fresnel principle, the method is first developed for the computation of the light distribution around the focus of an apertured spherical wave. The method, with modification, is then extended to treat the 3D diffraction of an aperture with an arbitrary transmittance function.
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Affiliation(s)
- J Lin
- Photonics Research Centre, School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798, Singapore
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14
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Abstract
We show that phase objects may be computed accurately from a single color image in a brightfield microscope, with no hardware modification. Our technique uses the chromatic aberration that is inherent to every lens-based imaging system as a phase contrast mechanism. This leads to a simple and inexpensive way of achieving single-shot quantitative phase recovery by a modified Transport of Intensity Equation (TIE) solution, allowing real-time phase imaging in a traditional microscope.
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Affiliation(s)
- Laura Waller
- Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA.
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15
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Kou SS, Waller L, Barbastathis G, Sheppard CJR. Transport-of-intensity approach to differential interference contrast (TI-DIC) microscopy for quantitative phase imaging. Opt Lett 2010; 35:447-9. [PMID: 20125750 DOI: 10.1364/ol.35.000447] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Differential interference contrast (DIC) microscopy is an inherently qualitative phase-imaging technique. What is obtained is an image with mixed phase-gradient and amplitude information rather than a true linear mapping of actual optical path length (OPL) differences. Here we investigate an approach that combines the transport-of-intensity equation (TIE) with DIC microscopy, thus improving direct visual observation. There is little hardware modification and the computation is noniterative. Numerically solving for the propagation of light in a series of through-focus DIC images allows linear phase information in a single slice to be completely determined and restored from DIC intensity values.
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Affiliation(s)
- Shan Shan Kou
- Optical Bioimaging Laboratory, Division of Bioengineering, National University of Singapore, 7 Engineering Drive 1,Singapore 117576, Singapore.
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16
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Abstract
Three-dimensional (3D) imaging by holographic tomography can be performed for a fixed detector through rotation of either the object or the illumination beam. We have previously presented a paraxial treatment to distinguish between these two approaches using transfer function analysis. In particular, the cutoff of the transfer function when rotating the illumination about one axis was calculated analytically using one-dimensional Fourier integration of the defocused transfer function. However, high numerical aperture objectives are usually used in experimental arrangements, and the previous paraxial model is not accurate in this case. Hence, in this analysis, we utilize 3D analytical geometry to derive the imaging behavior for holographic tomography under high-aperture conditions. As expected, the cutoff of the new transfer function leads to a similar peanut shape, but we found that there was no line singularity as was previously observed in the paraxial case. We also present the theory of coherent transfer function for holographic tomography under object rotation while the detector is kept stationary. The derived coherent transfer functions offer quantitative insights into the image formation of a diffractive tomography system.
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Affiliation(s)
- Shan Shan Kou
- Optical Bioimaging Laboratory, Division of Bioengineering, National University of Singapore, 7 Engineering Drive 1, Singapore 117576, Singapore
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17
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Abstract
Tomography has been applied to holographic imaging systems recently to improve the 3D imaging performance. However, there are two distinct ways to achieve this: either by rotation of the object or by rotation of the illumination beam. We provide a transfer function analysis to distinguish between these two techniques and to predict the 3D imaging performance in holographic tomography when diffraction effects are considered. The results show that the configuration of rotating the illumination beam in one direction while fixing the sample leads to different 3D imaging performance as compared to the configuration of rotating the sample. The spatial frequency cutoff is nonisotropic in the case of rotating the illumination, and a curved line of singularity is observed. Rotating of the sample, on the contrary, has more symmetry in spatial frequency coverage but has a single point of singularity. The 3D transfer function derived can be used for 3D image reconstruction.
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Affiliation(s)
- Shan Shan Kou
- Optical Bioimaging Laboratory, Division of Bioengineering, National University of Singapore, Singapore
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