427 results found
Abdelwahab I, Grinblat G, Leng K, et al., 2018, Highly Enhanced Third-Harmonic Generation in 2D Perovskites at Excitonic Resonances, ACS NANO, Vol: 12, Pages: 644-650, ISSN: 1936-0851
Black NCG, Rungger I, Li B, et al., 2018, Adsorption dynamics of CVD graphene investigated by a contactless microwave method, 2D MATERIALS, Vol: 5, ISSN: 2053-1583
Bobrovska N, Matuszewski M, Daskalakis KS, et al., 2018, Dynamical Instability of a Nonequilibrium Exciton-Polariton Condensate, ACS PHOTONICS, Vol: 5, Pages: 111-118, ISSN: 2330-4022
Brown LV, Davanco M, Sun Z, et al., 2018, Nanoscale Mapping and Spectroscopy of Nonradiative Hyperbolic Modes in Hexagonal Boron Nitride Nanostructures, NANO LETTERS, Vol: 18, Pages: 1628-1636, ISSN: 1530-6984
Cambiasso J, Koenig M, Cortes E, et al., 2018, Surface-Enhanced Spectroscopies of a Molecular Monolayer in an All-Dielectric Nanoantenna, ACS PHOTONICS, Vol: 5, Pages: 1546-1557, ISSN: 2330-4022
Chen J, Zhao X, Grinblat G, et al., 2018, Homoepitaxial Growth of Large-Scale Highly Organized Transition Metal Dichalcogenide Patterns, ADVANCED MATERIALS, Vol: 30, ISSN: 0935-9648
Gennaro SD, Li Y, Maier SA, et al., 2018, Double blind ultrafast pulse characterization by mixed frequency generation in a gold antenna, ACS Photonics
© 2018 American Chemical Society. Ultrafast pulse characterization requires the analysis of correlation functions generated by frequency mixing of optical pulses in a nonlinear medium. In this work, we use a gold optical nanoantenna to generate simultaneously Four Wave Mixing and Sum Frequency Generation across the tuning range of a Ti: Sapphire and Optical Parametric Oscillator (OPO) system. Since metal nanoparticles create remarkably strong nonlinear responses for their size without the need for phase matching, this allows us to simultaneously characterize the unknown OPO pulse and its pump pulse using a single spectrogram. The nonlinear mixing is efficient enough to retrieve pulses with energies in the picojoule range.
Gu Y, Zhang Y, Li Y, et al., 2018, Raman photostability of off-resonant gap-enhanced Raman tags, RSC ADVANCES, Vol: 8, Pages: 14434-14444, ISSN: 2046-2069
Hasan M, Khunsin W, Mavrokefalos CK, et al., 2018, Facile Electrochemical Synthesis of Pd Nanoparticles with Enhanced Electrocatalytic Properties from Surfactant-Free Electrolyte, CHEMELECTROCHEM, Vol: 5, Pages: 619-629, ISSN: 2196-0216
Hu H, Zhang J, Maier SA, et al., 2018, Enhancing Third-Harmonic Generation with Spatial Nonlocality, ACS PHOTONICS, Vol: 5, Pages: 592-598, ISSN: 2330-4022
Ma Z, Li Y, Li Y, et al., 2018, All-dielectric planar chiral metasurface with gradient geometric phase, OPTICS EXPRESS, Vol: 26, Pages: 6067-6078, ISSN: 1094-4087
Matsui T, Li Y, Hsu M-HM, et al., 2018, Highly Stable Plasmon Induced Hot Hole Transfer into Silicon via a SrTiO3 Passivation Interface, ADVANCED FUNCTIONAL MATERIALS, Vol: 28, ISSN: 1616-301X
Mellor A, Guarracino I, Llin LF, et al., 2018, Specially designed solar cells for hybrid photovoltaic-thermal generators, Pages: 1-4
© 2017 IEEE. The performance of hybrid photovoltaic-thermal systems can be improved using PV cells that are specially designed to generate both electricity and useful heat with maximum efficiency. Present systems, however, use standard PV cells that are only optimized for electrical performance. In this work, we have developed two cell-level components that will improve the thermal efficiency of PV-T collectors, with minimal loss of electrical efficiency. These are a spectrally-selective low- emissivity coating to reduce radiative thermal losses, and a nanotextured rear reflector to improve absorption of the near- infrared part of the solar spectrum for heat generation.
Mellor A, Hylton NP, Wellens C, et al., 2018, Improving the radiation hardness of space solar cells via nanophotonic light trapping, Pages: 1-4
© 2017 IEEE. We show that the radiation-hardness of space solar cells can be significantly improved by employing nanophotonic light trapping. Two light-trapping structures are investigated in this work. In the first, an array of Al nanoparticles is embedded within the anti-reflection coating of a GaInP/InGaAs/Ge solar cell. A combined experimental and simulation study shows that this structure is unlikely to lead to an improvement in radiation hardness. In the second, a diffractive structure is positioned between the middle cell and the bottom cell. Computational results, obtained using an experimentally validated electro-optical simulation tool, show that a properly designed light-trapping structure in this position can lead to a relative 10% improvement in the middle-cell photocurrent at end-of-life.
Mignuzzi S, Mota M, Coenen T, et al., 2018, Energy-Momentum Cathodoluminescence Spectroscopy of Dielectric Nanostructures, ACS PHOTONICS, Vol: 5, Pages: 1381-1387, ISSN: 2330-4022
Morozov S, Gaio M, Maier SA, et al., 2018, Metal-Dielectric Parabolic Antenna for Directing Single Photons, NANO LETTERS, Vol: 18, Pages: 3060-3065, ISSN: 1530-6984
Shibanuma T, Maier SA, Albella P, 2018, Polarization control of high transmission/reflection switching by all-dielectric metasurfaces, APPLIED PHYSICS LETTERS, Vol: 112, ISSN: 0003-6951
Simoncelli S, Li Y, Cortes E, et al., 2018, Nanoscale Control of Molecular Self-Assembly Induced by Plasmonic Hot-Electron Dynamics, ACS NANO, Vol: 12, Pages: 2184-2192, ISSN: 1936-0851
Simoncelli S, Li Y, Cortes E, et al., 2018, Imaging Plasmon Hybridization of Fano Resonances via Hot-Electron-Mediated Absorption Mapping, NANO LETTERS, Vol: 18, Pages: 3400-3406, ISSN: 1530-6984
Wang Z, Dong Z, Zhu H, et al., 2018, Selectively Plasmon-Enhanced Second-Harmonic Generation from Monolayer Tungsten Diselenide on Flexible Substrates, ACS NANO, Vol: 12, Pages: 1859-1867, ISSN: 1936-0851
Wells MP, Bower R, Kilmurray R, et al., 2018, Temperature stability of thin film refractory plasmonic materials, OPTICS EXPRESS, Vol: 26, Pages: 15726-15744, ISSN: 1094-4087
Wells MP, Zou B, Mihai AP, et al., 2018, Multiphase strontium molybdate thin films for plasmonic local heating applications, Optical Materials Express, Vol: 8, Pages: 1806-1817
© 2018 Optical Society of America. In the search for alternative plasmonic materials, SrMoO3 has recently been identified as possessing a number of desirable optical properties. Owing to the requirement for many plasmonic devices to operate at elevated temperatures however, it is essential to characterize the degradation of these properties upon heating. Here, SrMoO3 thin films are annealed in air at temperatures ranging from 75-500° C. Characterizations by AFM, XRD, and spectroscopic ellipsometry after each anneal identify a loss of metallic behaviour after annealing at 500° C, together with the underlying mechanism. Moreover, it is shown that by annealing the films in nitrogen following deposition, an additional crystalline phase of SrMoO4is induced at the film's surface, which suppresses oxidation at elevated temperatures.
Yang Q, Zhang C, Wu S, et al., 2018, Photonic surface waves enabled perfect infrared absorption by monolayer graphene, NANO ENERGY, Vol: 48, Pages: 161-169, ISSN: 2211-2855
Allen M, Allen J, Wasserman D, et al., 2017, Special Section Guest Editorial: Plasmonics Systems and Applications, Optical Engineering, Vol: 56, ISSN: 0091-3286
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE). This guest editorial introduces the Special Section on Plasmonics Systems and Applications.
Androvitsaneas P, Young AB, Lennon JM, et al., 2017, Efficient deterministic giant photon phase shift from a single charged quantum dot
© OSA 2017. We demonstrate a deterministic shift in phase of an input single photon by a negatively charged quantum dot in a low Q-factor, high output efficiency micropillar cavity, with values up to 2π/3.
Berte R, Gubbin CR, Wheeler VD, et al., 2017, Sub-nanometer thin oxide film sensing with localized surface phonon polaritons, ACS Photonics
© 2018 American Chemical Society. Chemical sensing methods based on surface polaritonic resonances stem from their intense near fields and resultant sensitivity to changes in local refractive index. Polar dielectric crystals (e.g. SiC, hBN) support surface phonon polaritons (SPhPs) from the mid-infrared to terahertz range with mode volumes and quality factors exceeding the best case scenario attained by plasmonic counterparts, making them strong candidates for resonant surface-enhanced infrared spectroscopy (SEIRA). We report on the behaviour of SPhP resonances of SiC nanopillars following the incorporation of sub- and nanometric coatings of Al2O3and ZrO2obtained by atomic layer deposition. Concurrent anomalous red and blue-shifts of SPhP resonances were observed upon deposition of sub-nanometric Al2O3films, with shift direction dictated by the mode position relative to the ordinary longitudinal optic (LO) phonon of Al2O3. These concurrent shifts, which are attributed to coupling to the Berreman mode of the Al2O3layer, persist for thicker films and are correctly predicted by numerical calculations employing the measured Al2O3permittivity. Deposition of ZrO2, whose phonon resonances are detuned from the SPhPs, also led to anomalous blue-shifts of transverse and longitudinal SPhP resonances around 900 cm-1for films up to ≈ 1.5 nm, reversing to the canonical red-shift for thicker layers. These anomalous shifts were not reproduced numerically using the measured ZrO2permittivity and suggest the existence of a localized surface state, which when modelled as a simple Lorentz oscillator, provide semi-quantitative agreement with experimental results. In addition, predicted shifts for thicker ZrO2layers may thus provide a tool for real-time monitoring of ultrathin film growth.
Black NCG, Liu CG, Pearce R, et al., 2017, Graphene gas sensing using a non-contact microwave method, NANOTECHNOLOGY, Vol: 28, ISSN: 0957-4484
Braic L, Vasilantonakis N, Mihai A, et al., 2017, Titanium Oxynitride Thin Films with Tunable Double Epsilon-Near-Zero Behavior for Nanophotonic Applications, ACS APPLIED MATERIALS & INTERFACES, Vol: 9, Pages: 29857-29862, ISSN: 1944-8244
Cambiasso J, Grinblat G, Li Y, et al., 2017, Bridging the Gap between Dielectric Nanophotonics and the Visible Regime with Effectively Lossless Gallium Phosphide Antennas, NANO LETTERS, Vol: 17, Pages: 1219-1225, ISSN: 1530-6984
Canet-Ferrer J, Albella P, Ribera A, et al., 2017, Hybrid magnetite-gold nanoparticles as bifunctional magnetic-plasmonic systems: three representative cases, NANOSCALE HORIZONS, Vol: 2, Pages: 205-216, ISSN: 2055-6756
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