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Rasoga O, Dragoman D, Dinescu A, Dirdal CA, Zgura I, Nastase F, Baracu AM, Iftimie S, Galca AC. Tuning the infrared resonance of thermal emission from metasurfaces working in near-infrared. Sci Rep 2023; 13:7499. [PMID: 37161016 PMCID: PMC10169807 DOI: 10.1038/s41598-023-34741-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 05/06/2023] [Indexed: 05/11/2023] Open
Abstract
We simulated numerically and demonstrated experimentally that the thermal emittance of a metasurface consisting of an array of rectangular metallic meta-atoms patterned on a layered periodic dielectric structure grown on top of a metallic layer can be tuned by changing several parameters. The resonance frequency, designed to be in the near-infrared spectral region, can be tuned by modifying the number of dielectric periods, and the polarization and incidence angle of the incoming radiation. In addition, the absorbance/emittance value at the resonant wavelength can be tuned by modifying the orientation of meta-atoms with respect to the illumination direction.
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Affiliation(s)
- Oana Rasoga
- National Institute of Materials Physics, 405A Atomistilor Street, 077125, Magurele, Romania.
| | - Daniela Dragoman
- Faculty of Physics, University of Bucharest, 405 Atomistilor Street, P.O. Box MG-11, 077125, Magurele, Romania.
| | - Adrian Dinescu
- National Institute for Research and Development in Microtechnologies-IMT Bucharest, 126A, Erou Iancu Nicolae Street, 077190, Voluntari, Romania
| | | | - Irina Zgura
- National Institute of Materials Physics, 405A Atomistilor Street, 077125, Magurele, Romania
| | - Florin Nastase
- National Institute for Research and Development in Microtechnologies-IMT Bucharest, 126A, Erou Iancu Nicolae Street, 077190, Voluntari, Romania
| | - Angela Mihaela Baracu
- National Institute for Research and Development in Microtechnologies-IMT Bucharest, 126A, Erou Iancu Nicolae Street, 077190, Voluntari, Romania
| | - Sorina Iftimie
- Faculty of Physics, University of Bucharest, 405 Atomistilor Street, P.O. Box MG-11, 077125, Magurele, Romania
| | - Aurelian Catalin Galca
- National Institute of Materials Physics, 405A Atomistilor Street, 077125, Magurele, Romania
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Socol M, Preda N, Breazu C, Costas A, Rasoga O, Petre G, Popescu-Pelin G, Iftimie S, Stochioiu A, Socol G, Stanculescu A. Macrocyclic Compounds: Metal Oxide Particles Nanocomposite Thin Films Deposited by MAPLE. Materials (Basel) 2023; 16:2480. [PMID: 36984360 PMCID: PMC10056935 DOI: 10.3390/ma16062480] [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] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 03/17/2023] [Accepted: 03/18/2023] [Indexed: 06/18/2023]
Abstract
Nanocomposite films based on macrocyclic compounds (zinc phthalocyanine (ZnPc) and 5,10,15,20-tetra(4-pyridyl) 21H,23H-porphyrin (TPyP)) and metal oxide nanoparticles (ZnO or CuO) were deposited by matrix-assisted pulsed laser evaporation (MAPLE). 1,4-dioxane was used as a solvent in the preparation of MAPLE targets that favor the deposition of films with a low roughness, which is a key feature for their integration in structures for optoelectronic applications. The influence of the addition of ZnO nanoparticles (~20 nm in size) or CuO nanoparticles (~5 nm in size) in the ZnPc:TPyP mixture and the impact of the added metal oxide amount on the properties of the obtained composite films were evaluated in comparison to a reference layer based only on an organic blend. Thus, in the case of nanocomposite films, the vibrational fingerprints of both organic compounds were identified in the infrared spectra, their specific strong absorption bands were observed in the UV-Vis spectra, and a quenching of the TPyP emission band was visible in the photoluminescence spectra. The morphological analysis evidenced agglomerated particles on the composite film surface, but their presence has no significant impact on the roughness of the MAPLE deposited layers. The current density-voltage (J-V) characteristics of the structures based on the nanocomposite films deposited by MAPLE revealed the critical role played by the layer composition and component ratio, an improvement in the electrical parameters values being achieved only for the films with a certain type and optimum amount of metal oxide nanoparticles.
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Affiliation(s)
- Marcela Socol
- National Institute of Materials Physics, 405A Atomistilor Street, 077125 Magurele, Romania
| | - Nicoleta Preda
- National Institute of Materials Physics, 405A Atomistilor Street, 077125 Magurele, Romania
| | - Carmen Breazu
- National Institute of Materials Physics, 405A Atomistilor Street, 077125 Magurele, Romania
| | - Andreea Costas
- National Institute of Materials Physics, 405A Atomistilor Street, 077125 Magurele, Romania
| | - Oana Rasoga
- National Institute of Materials Physics, 405A Atomistilor Street, 077125 Magurele, Romania
| | - Gabriela Petre
- National Institute of Materials Physics, 405A Atomistilor Street, 077125 Magurele, Romania
- Faculty of Physics, University of Bucharest, 405 Atomistilor Street, 077125 Magurele, Romania
| | - Gianina Popescu-Pelin
- National Institute for Lasers, Plasma and Radiation Physics, 409 Atomistilor Street, 077125 Magurele, Romania
| | - Sorina Iftimie
- Faculty of Physics, University of Bucharest, 405 Atomistilor Street, 077125 Magurele, Romania
| | - Andrei Stochioiu
- Faculty of Physics, University of Bucharest, 405 Atomistilor Street, 077125 Magurele, Romania
- National Institute for Lasers, Plasma and Radiation Physics, 409 Atomistilor Street, 077125 Magurele, Romania
| | - Gabriel Socol
- National Institute for Lasers, Plasma and Radiation Physics, 409 Atomistilor Street, 077125 Magurele, Romania
| | - Anca Stanculescu
- National Institute of Materials Physics, 405A Atomistilor Street, 077125 Magurele, Romania
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Dirdal CA, Milenko K, Summanwar A, Dullo FT, Thrane PCV, Rasoga O, Avram AM, Dinescu A, Baracu AM. UV-Nanoimprint and Deep Reactive Ion Etching of High Efficiency Silicon Metalenses: High Throughput at Low Cost with Excellent Resolution and Repeatability. Nanomaterials (Basel) 2023; 13:436. [PMID: 36770397 PMCID: PMC9920157 DOI: 10.3390/nano13030436] [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] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 01/10/2023] [Accepted: 01/17/2023] [Indexed: 06/18/2023]
Abstract
As metasurfaces begin to find industrial applications there is a need to develop scalable and cost-effective fabrication techniques which offer sub-100 nm resolution while providing high throughput and large area patterning. Here we demonstrate the use of UV-Nanoimprint Lithography and Deep Reactive Ion Etching (Bosch and Cryogenic) towards this goal. Robust processes are described for the fabrication of silicon rectangular pillars of high pattern fidelity. To demonstrate the quality of the structures, metasurface lenses, which demonstrate diffraction limited focusing and close to theoretical efficiency for NIR wavelengths λ ∈ (1.3 μm, 1.6 μm), are fabricated. We demonstrate a process which removes the characteristic sidewall surface roughness of the Bosch process, allowing for smooth 90-degree vertical sidewalls. We also demonstrate that the optical performance of the metasurface lenses is not affected adversely in the case of Bosch sidewall surface roughness with 45 nm indentations (or scallops). Next steps of development are defined for achieving full wafer coverage.
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Affiliation(s)
| | - Karolina Milenko
- SINTEF Microsystems and Nanotechnology, Gaustadalleen 23C, 0737 Oslo, Norway
| | - Anand Summanwar
- SINTEF Microsystems and Nanotechnology, Gaustadalleen 23C, 0737 Oslo, Norway
| | - Firehun T. Dullo
- SINTEF Microsystems and Nanotechnology, Gaustadalleen 23C, 0737 Oslo, Norway
| | - Paul C. V. Thrane
- SINTEF Microsystems and Nanotechnology, Gaustadalleen 23C, 0737 Oslo, Norway
| | - Oana Rasoga
- National Institute of Materials Physics, Atomistilor Street 405 A, 077125 Magurele, Romania
| | - Andrei M. Avram
- National Institute for Research and Development in Microtechnologies-IMT Bucharest, Erou Iancu Nicolae Street 126A, 077190 Voluntari, Romania
| | - Adrian Dinescu
- National Institute for Research and Development in Microtechnologies-IMT Bucharest, Erou Iancu Nicolae Street 126A, 077190 Voluntari, Romania
| | - Angela M. Baracu
- National Institute for Research and Development in Microtechnologies-IMT Bucharest, Erou Iancu Nicolae Street 126A, 077190 Voluntari, Romania
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Socol M, Preda N, Breazu C, Petre G, Stanculescu A, Stavarache I, Popescu-Pelin G, Stochioiu A, Socol G, Iftimie S, Thanner C, Rasoga O. Effects of Solvent Additive and Micro-Patterned Substrate on the Properties of Thin Films Based on P3HT:PC70BM Blends Deposited by MAPLE. Materials (Basel) 2022; 16:144. [PMID: 36614483 PMCID: PMC9821753 DOI: 10.3390/ma16010144] [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] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 12/14/2022] [Accepted: 12/15/2022] [Indexed: 06/17/2023]
Abstract
Lately, there is a growing interest in organic photovoltaic (OPV) cells due to the organic materials' properties and compatibility with various types of substrates. However, their efficiencies are low relative to the silicon ones; therefore, other ways (i.e., electrode micron/nanostructuring, synthesis of new organic materials, use of additives) to improve their performances are still being sought. In this context, we studied the behavior of the common organic bulk heterojunction (P3HT:PC70BM) deposited by matrix-assisted pulsed laser evaporation (MAPLE) with/without 0.3% of 1,8-diiodooctane (DIO) additive on flat and micro-patterned ITO substrates. The obtained results showed that in the MAPLE process, a small quantity of additive can modify the morphology of the organic films and decrease their roughness. Besides the use of the additive, the micro-patterning of the electrode leads to a greater increase in the absorption of the studied photovoltaic structures. The inferred values of the filling factors for the measured cells in ambient conditions range from 19% for the photovoltaic structures with no additive and without substrate patterning to 27% for the counterpart structures with patterning and a small quantity of additive.
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Affiliation(s)
- Marcela Socol
- National Institute of Materials Physics, 405A Atomistilor Street, 077125 Magurele, Romania
| | - Nicoleta Preda
- National Institute of Materials Physics, 405A Atomistilor Street, 077125 Magurele, Romania
| | - Carmen Breazu
- National Institute of Materials Physics, 405A Atomistilor Street, 077125 Magurele, Romania
| | - Gabriela Petre
- National Institute of Materials Physics, 405A Atomistilor Street, 077125 Magurele, Romania
- Faculty of Physics, University of Bucharest, 405 Atomistilor Street, 077125 Magurele, Romania
| | - Anca Stanculescu
- National Institute of Materials Physics, 405A Atomistilor Street, 077125 Magurele, Romania
| | - Ionel Stavarache
- National Institute of Materials Physics, 405A Atomistilor Street, 077125 Magurele, Romania
| | - Gianina Popescu-Pelin
- National Institute for Lasers, Plasma and Radiation Physics, 409 Atomistilor Street, 077125 Magurele, Romania
| | - Andrei Stochioiu
- Faculty of Physics, University of Bucharest, 405 Atomistilor Street, 077125 Magurele, Romania
- National Institute for Lasers, Plasma and Radiation Physics, 409 Atomistilor Street, 077125 Magurele, Romania
| | - Gabriel Socol
- National Institute for Lasers, Plasma and Radiation Physics, 409 Atomistilor Street, 077125 Magurele, Romania
| | - Sorina Iftimie
- Faculty of Physics, University of Bucharest, 405 Atomistilor Street, 077125 Magurele, Romania
| | - Christine Thanner
- EVGroup, DI Erich Thallner Strasse 1, 4782 St. Florian am Inn, Austria
| | - Oana Rasoga
- National Institute of Materials Physics, 405A Atomistilor Street, 077125 Magurele, Romania
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Rasoga O, Breazu C, Socol M, Solonaru AM, Vacareanu L, Petre G, Preda N, Stanculescu F, Socol G, Girtan M, Stanculescu A. Effect of Aluminum Nanostructured Electrode on the Properties of Bulk Heterojunction Based Heterostructures for Electronics. Nanomaterials (Basel) 2022; 12:4230. [PMID: 36500855 PMCID: PMC9737908 DOI: 10.3390/nano12234230] [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] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/16/2022] [Accepted: 11/21/2022] [Indexed: 06/17/2023]
Abstract
The properties of organic heterostructures with mixed layers made of arylenevinylene-based polymer donor and non-fullerene perylene diimide acceptor, deposited using Matrix Assisted Pulsed Laser Evaporation on flat Al and nano-patterned Al electrodes, were investigated. The Al layer electrode deposited on the 2D array of cylindrical nanostructures with a periodicity of 1.1 µm, developed in a polymeric layer using UV-Nanoimprint Lithography, is characterized by an inflorescence-like morphology. The effect of the nanostructuring on the optical and electrical properties was studied by comparison with those of the heterostructures based on a mixed layer with fullerene derivative acceptor. The low roughness of the mixed layer deposited on flat Al was associated with high reflectance. The nano-patterning, which was preserved in the mixed layer, determining the light trapping by multiple scattering, correlated with the high roughness and led to lower reflectance. A decrease was also revealed in photoluminescence emission both at UV and Vis excitation of the mixed layer, with the non-fullerene acceptor deposited on nano-patterned Al. An injector contact behavior was highlighted for all Al/mixed layer/ITO heterostructures by I-V characteristics in dark. The current increased, independently of acceptor (fullerene or non-fullerene), in the heterostructures with nano-patterned Al electrodes for shorter conjugation length polymer donors.
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Affiliation(s)
- Oana Rasoga
- Laboratory of Optical Processes in Nanostructured Materials, National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, 077125 Magurele, Romania
| | - Carmen Breazu
- Laboratory of Optical Processes in Nanostructured Materials, National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, 077125 Magurele, Romania
| | - Marcela Socol
- Laboratory of Optical Processes in Nanostructured Materials, National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, 077125 Magurele, Romania
| | - Ana-Maria Solonaru
- Electroactive Polymers and Plasmochemistry, Petru Poni Institute of Macromolecular Chemistry, 41A Gr. Ghica Voda Alley, 700487 Iasi, Romania
| | - Loredana Vacareanu
- Electroactive Polymers and Plasmochemistry, Petru Poni Institute of Macromolecular Chemistry, 41A Gr. Ghica Voda Alley, 700487 Iasi, Romania
| | - Gabriela Petre
- Laboratory of Optical Processes in Nanostructured Materials, National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, 077125 Magurele, Romania
- Faculty of Physics, University of Bucharest, 405 Atomistilor Street, P.O. Box MG-11, 077125 Magurele, Romania
| | - Nicoleta Preda
- Laboratory of Optical Processes in Nanostructured Materials, National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, 077125 Magurele, Romania
| | - Florin Stanculescu
- Faculty of Physics, University of Bucharest, 405 Atomistilor Street, P.O. Box MG-11, 077125 Magurele, Romania
| | - Gabriel Socol
- Optical Processes in Nanostructured Materials Laboratory, National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, P.O. Box MG-36, 077125 Magurele, Romania
| | - Mihaela Girtan
- Laboratoire LPHIA, Université d’Angers, LUNAM, 2 Bd. Lavoisier, 49045 Angers, France
| | - Anca Stanculescu
- Laboratory of Optical Processes in Nanostructured Materials, National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, 077125 Magurele, Romania
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Stanculescu A, Socol M, Rasoga O, Breazu C, Preda N, Stanculescu F, Socol G, Vacareanu L, Girtan M, Doroshkevich AS. Arylenevinylene Oligomer-Based Heterostructures on Flexible AZO Electrodes. Materials (Basel) 2021; 14:7688. [PMID: 34947285 PMCID: PMC8709386 DOI: 10.3390/ma14247688] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 11/29/2021] [Accepted: 12/08/2021] [Indexed: 12/05/2022]
Abstract
We investigated the optical and electrical properties of flexible single and bi-layer organic heterostructures prepared by vacuum evaporation with a p-type layer of arylenevinylene oligomers, based on carbazole, 3,3' bis(N hexylcarbazole)vinylbenzene = L13, or triphenylamine, 1,4 bis [4 (N,N' diphenylamino)phenylvinyl] benzene = L78, and an n-type layer of 5,10,15,20-tetra(4-pyrydil)21H,23H-porphyne = TPyP. Transparent conductor films of Al-doped ZnO (AZO) with high transparency, >90% for wavelengths > 400 nm, and low resistivity, between 6.9 × 10-4 Ω·cm and 23 × 10-4 Ω·cm, were deposited by pulsed laser deposition on flexible substrates of polyethylene terephthalate (PET). The properties of the heterostructures based on oligomers and zinc phthalocyanine (ZnPc) were compared, emphasizing the effect of the surface morphology. The measurements revealed a good absorption in the visible range of the PET/AZO/arylenevinylene oligomer/TPyP heterostructures and a typical injection contact behavior with linear (ZnPc, L78) or non-linear (L13) J-V characteristics in the dark, at voltages < 0.4 V. The heterostructure PET/AZO/L78/TPyP/Al showed a current density of ~1 mA/cm2 at a voltage of 0.3 V. The correlation between the roughness exponent, evaluated from the height-height correlation function, grain shape, and electrical behavior was analyzed. Consequently, the oligomer based on triphenylamine could be a promising replacement of donor ZnPc in flexible electronic applications.
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Affiliation(s)
- Anca Stanculescu
- Optical Processes in Nanostructured Materials Laboratory, National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, 077125 Magurele, Romania; (M.S.); (O.R.); (C.B.); (N.P.)
| | - Marcela Socol
- Optical Processes in Nanostructured Materials Laboratory, National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, 077125 Magurele, Romania; (M.S.); (O.R.); (C.B.); (N.P.)
| | - Oana Rasoga
- Optical Processes in Nanostructured Materials Laboratory, National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, 077125 Magurele, Romania; (M.S.); (O.R.); (C.B.); (N.P.)
| | - Carmen Breazu
- Optical Processes in Nanostructured Materials Laboratory, National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, 077125 Magurele, Romania; (M.S.); (O.R.); (C.B.); (N.P.)
| | - Nicoleta Preda
- Optical Processes in Nanostructured Materials Laboratory, National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, 077125 Magurele, Romania; (M.S.); (O.R.); (C.B.); (N.P.)
| | - Florin Stanculescu
- Faculty of Physics, University of Bucharest, 405 Atomistilor Street, P.O. Box MG-11, 077125 Magurele, Romania;
| | - Gabriel Socol
- Optical Processes in Nanostructured Materials Laboratory, National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor Street, P.O. Box MG-36, 077125 Magurele, Romania;
| | - Loredana Vacareanu
- Electroactive Polymers and Plasmochemistry, P. Poni Institute of Macromolecular Chemistry, 41 A Gr. Ghica Voda Alley, 700487 Iasi, Romania;
| | - Mihaela Girtan
- Laboratoire LPHIA, Université d’Angers, LUNAM 2, Bd. Lavoisier, 49045 Angers, France;
| | - Aleksandr S. Doroshkevich
- Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 6 Joliot-Curie Str., 141980 Dubna, Russia;
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Breazu C, Socol M, Preda N, Rasoga O, Costas A, Socol G, Petre G, Stanculescu A. Nucleobases thin films deposited on nanostructured transparent conductive electrodes for optoelectronic applications. Sci Rep 2021; 11:7551. [PMID: 33824369 PMCID: PMC8024358 DOI: 10.1038/s41598-021-87181-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 03/15/2021] [Indexed: 02/01/2023] Open
Abstract
Environmentally-friendly bio-organic materials have become the centre of recent developments in organic electronics, while a suitable interfacial modification is a prerequisite for future applications. In the context of researches on low cost and biodegradable resource for optoelectronics applications, the influence of a 2D nanostructured transparent conductive electrode on the morphological, structural, optical and electrical properties of nucleobases (adenine, guanine, cytosine, thymine and uracil) thin films obtained by thermal evaporation was analysed. The 2D array of nanostructures has been developed in a polymeric layer on glass substrate using a high throughput and low cost technique, UV-Nanoimprint Lithography. The indium tin oxide electrode was grown on both nanostructured and flat substrate and the properties of the heterostructures built on these two types of electrodes were analysed by comparison. We report that the organic-electrode interface modification by nano-patterning affects both the optical (transmission and emission) properties by multiple reflections on the walls of nanostructures and the electrical properties by the effect on the organic/electrode contact area and charge carrier pathway through electrodes. These results encourage the potential application of the nucleobases thin films deposited on nanostructured conductive electrode in green optoelectronic devices.
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Affiliation(s)
- C Breazu
- National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, 077125, Magurele, Romania.
| | - M Socol
- National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, 077125, Magurele, Romania
| | - N Preda
- National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, 077125, Magurele, Romania
| | - O Rasoga
- National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, 077125, Magurele, Romania
| | - A Costas
- National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, 077125, Magurele, Romania
| | - G Socol
- Plasma and Radiation Physics, National Institute for Lasers, 409 Atomistilor Street, 077125, Magurele, Romania
| | - G Petre
- National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, 077125, Magurele, Romania
- Faculty of Physics, University of Bucharest, 405 Atomistilor Street, PO Box MG-11, 077125, Magurele, Romania
| | - A Stanculescu
- National Institute of Materials Physics, 405A Atomistilor Street, P.O. Box MG-7, 077125, Magurele, Romania.
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Rasoga O, Dragoman D. Engineered beam shaping effect in anisotropic photonic crystals. Appl Opt 2010; 49:2161-2167. [PMID: 20390018 DOI: 10.1364/ao.49.002161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We demonstrate that an anisotropic photonic crystal can modify the shape of a highly convergent incident optical beam. The beam shape engineering is relatively easy, and the photonic crystal is less alignment demanding than beam shapers that incorporate several optical systems. The shape of the output beam can be controlled by an appropriate choice of the angular divergence of the beam, the number of periods and the birefringence values and layer widths of the constituent materials.
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Affiliation(s)
- Oana Rasoga
- National Institute of Materials Physics, P.O. Box MG-7, 077125 Bucharest, Romania
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