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Wang J, Zuo Y, Wang X, Christodoulides DN, Siviloglou GA, Chen JF. Spatiotemporal Single-Photon Airy Bullets. PHYSICAL REVIEW LETTERS 2024; 132:143601. [PMID: 38640368 DOI: 10.1103/physrevlett.132.143601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 01/09/2024] [Indexed: 04/21/2024]
Abstract
Uninhibited control of the complex spatiotemporal quantum wave function of a single photon has so far remained elusive even though it can dramatically increase the encoding flexibility and thus the information capacity of a photonic quantum link. By fusing temporal waveform generation in an atomic ensemble and spatial single-photon shaping, we hereby demonstrate for the first time complete spatiotemporal control of a propagation invariant (2+1)D Airy single-photon optical bullet. These correlated photons are not only self-accelerating and impervious to spreading as their classical counterparts, but can be concealed and revealed in the presence of strong classical stray light.
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Affiliation(s)
- Jianmin Wang
- Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
- Shenzhen International Quantum Academy, Shenzhen, 518048, China
| | - Ying Zuo
- Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
- Shenzhen International Quantum Academy, Shenzhen, 518048, China
| | - Xingchang Wang
- Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
- Shenzhen International Quantum Academy, Shenzhen, 518048, China
| | - Demetrios N Christodoulides
- Ming Hsieh Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, 90089, USA
| | - Georgios A Siviloglou
- Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
- Shenzhen International Quantum Academy, Shenzhen, 518048, China
| | - J F Chen
- Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
- Shenzhen International Quantum Academy, Shenzhen, 518048, China
- Department of Physics, Southern University of Science and Technology, Shenzhen, 518055, China
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Gatti A, Jedrkiewicz O, Brambilla E. Modeling the space-time correlation of pulsed twin beams. Sci Rep 2023; 13:16786. [PMID: 37798297 PMCID: PMC10556045 DOI: 10.1038/s41598-023-42588-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 09/12/2023] [Indexed: 10/07/2023] Open
Abstract
Entangled twin-beams generated by parametric down-conversion are among the favorite sources for imaging-oriented applications, due their multimodal nature in space and time. However, a satisfactory theoretical description is still lacking. In this work we propose a semi-analytic model which aims to bridge the gap between time-consuming numerical simulations and the unrealistic plane-wave pump theory. The model is used to study the quantum correlation and the coherence in the angle-frequency domain of the parametric emission, and demonstrates a [Formula: see text] growth of their size as the gain g increases, with a corresponding contraction of the space-time distribution. These predictions are systematically compared with the results of stochastic numerical simulations, performed in the Wigner representation, of the full model equations: an excellent agreement is shown even for parameters well outside the expected limit of validity of the model.
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Affiliation(s)
- Alessandra Gatti
- Istituto di Fotonica e Nanotecnologie del CNR, Piazza Leonardo da Vinci 32, 20133, Milano, Italy.
| | - Ottavia Jedrkiewicz
- Istituto di Fotonica e Nanotecnologie del CNR, Piazza Leonardo da Vinci 32, 20133, Milano, Italy
- Dipartimento di Scienze e Alta Tecnologia, Università dell'Insubria, Via Valleggio 11, 22100, Como, Italy
| | - Enrico Brambilla
- Dipartimento di Scienze e Alta Tecnologia, Università dell'Insubria, Via Valleggio 11, 22100, Como, Italy
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Rasputnyi AV, Kopylov DA, Murzina TV, Chekhova MV. Cascaded frequency up-conversion of bright squeezed vacuum: spectral and correlation properties. OPTICS LETTERS 2022; 47:766-769. [PMID: 35167520 DOI: 10.1364/ol.448790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 12/30/2021] [Indexed: 06/14/2023]
Abstract
High-gain parametric down-conversion (PDC) is inevitably accompanied by cascaded up-conversion (CUpC) of PDC radiation in a nonlinear crystal even if CUpC is nonphase matched. Here we study experimentally and theoretically the spectral properties of broadband phase-matched and nonphase-matched CUpC radiation in a beta barium borate (BBO) crystal. Our calculations of the normalized second-order correlation function predict the super-bunching of CUpC radiation.
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Cutipa P, Spasibko KY, Chekhova MV. Direct measurement of the coupled spatiotemporal coherence of parametric down-conversion under negative group-velocity dispersion. OPTICS LETTERS 2020; 45:3581-3584. [PMID: 32630904 DOI: 10.1364/ol.397700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 05/16/2020] [Indexed: 06/11/2023]
Abstract
We present a direct measurement of the spatiotemporal coherence of parametric down-conversion in the range of negative group-velocity dispersion. In this case, the frequency-angular spectra are ring-shaped, and temporal coherence is coupled to spatial coherence. Correspondingly, the lack of coherence due to spatial displacement can be compensated for with the introduction of time delay. We show a simple technique, based on a modified Mach-Zehnder interferometer, which allows us to measure time coherence and near-field space coherence simultaneously, with complete control over both variables. This technique is also suitable for the measurement of second-order coherence, where the main applications are related to two-photon spectroscopy.
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Peřina J. Intense spectrally broad-band twin beams from poled nonlinear crystals. Sci Rep 2018; 8:15350. [PMID: 30337564 PMCID: PMC6193979 DOI: 10.1038/s41598-018-33546-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 09/21/2018] [Indexed: 11/13/2022] Open
Abstract
Properties of intense twin beams generated in parametric down-conversion in periodically poled LiNbO3 crystals and their chirped variants by intense pump fields are analyzed along the model of intense parametric down-conversion that allows for pump depletion and uses the dual spatio-spectral Schmidt modes. Spectral and spatial intensity auto- and cross-correlation functions are determined as they depend on the pump power. Temporal correlations in intense twin beams at the fs time scale are investigated using the Hong-Ou-Mandel interferometer and the process of sum-frequency generation.
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Affiliation(s)
- Jan Peřina
- Joint Laboratory of Optics of Palacký University and Institute of Physics of the Czech Academy of Sciences, Faculty of Science, Palacký University, 17. listopadu 12, 77146, Olomouc, Czech Republic.
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Peřina J, Haderka O, Allevi A, Bondani M. Internal dynamics of intense twin beams and their coherence. Sci Rep 2016; 6:22320. [PMID: 26924749 PMCID: PMC4770431 DOI: 10.1038/srep22320] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 02/11/2016] [Indexed: 11/12/2022] Open
Abstract
The dynamics of intense twin beams in pump-depleted parametric down-conversion is studied. A generalized parametric approximation is suggested to solve the quantum model. Its comparison with a semiclassical model valid for larger twin-beam intensities confirms its applicability. The experimentally observed maxima in the spectral and spatial intensity auto- and cross- correlation functions depending on pump power are explained in terms of different speeds of the (back-) flow of energy between the individual down-converted modes and the corresponding pump modes. This effect is also responsible for the gradual replacement of the initial exponential growth of the down-converted fields by the linear one. Furthermore, it forms a minimum in the curve giving the effective number of twin-beam modes. These effects manifest a tight relation between the twin-beam coherence and its internal structure, as clearly visible in the model. Multiple maxima in the intensity correlation functions originating in the oscillations of energy flow between the pump and down-converted modes are theoretically predicted.
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Affiliation(s)
- Jan Peřina
- RCPTM, Joint Laboratory of Optics of Palacký University and Inst. Phys. CAS, 17. listopadu 12, 77146 Olomouc, Czech Republic
| | - Ondřej Haderka
- Institute of Physics CAS, Joint Laboratory of Optics, 17. listopadu 50a, 77146 Olomouc, Czech Republic
| | - Alessia Allevi
- Dipartimento di Scienza e Alta Tecnologia, Università degli Studi dell'Insubria, Via Valleggio 11, 22100 Como, Italy.,CNISM UdR Como, Via Valleggio 11, 22100 Como, Italy
| | - Maria Bondani
- Istituto di Fotonica e Nanotecnologie, Consiglio Nazionale delle Ricerche, Via Valleggio 11, 22100 Como, Italy.,CNISM UdR Como, Via Valleggio 11, 22100 Como, Italy
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