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您的检索式：作者名="LUCAS V.BESTEIRO"
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| 1 | Ultra-broadband nanowire metamaterial absorber显示文摘Broadband absorbers generally consist of plasmonic cavities coupled to metallic resonators separated by a dielectric film,and they are vertically stacking configurations.In this work,we propose an ultra-broadband nanowire metamaterial absorber composed of an array of vertically aligned dielectric nanowires with coaxial metallic rings.The absorber shows strong absorption from 0.2 to 7μm with an average absorption larger than 91%due to the excitation of gap surface plasmon polariton modes in Fabry–Perot-like resonators.Moreover,a refractory dielectric cladding can be added to improve the thermal stability of the absorber,showing a negligible impact on its absorption performance.The proposed absorber may find potential applications in solar energy harvesting,infrared imaging and spectroscopy,and optoelectronic devices. | BAOQING WANG CUIPING MA PENG YU ALEXANDER O.GOVOROV HONGXING XU WENHAO WANG LUCAS V.BESTEIRO ZHIMIN JING PEIHANG LI ZHIMING WANG | 2022 | Photonics Research2022，10，12： | 0 |
| 2 | Directional radiation enhancement of nanowire quantum dots based on line-array plasmonic antenna coupling显示文摘The integration of a single III-V semiconductor quantum dot with a plasmonic nanoantenna as a means toward efficient single-photon sources(SPEs)is limited due to its weak,wide-angle emission,and low emission rate.These limitations can be overcome by designing a unique linear array of plasmonic antenna structures coupled to nanowire-based quantum dot(NWQD)emitters.A linear array of a coupled device composed of multiple plasmonic antennas at an optimum distance from the quantum dot emitter can be designed to enhance the directionality and the spontaneous emission rate of an integrated single-photon emitter.Finite element modeling has been used to design these compact structures with high quantum efficiencies and directionality of single-photon emission while retaining the advantages of NWQDs.The Purcell enhancement factor of these structures approaches 66.1 and 145.8,respectively.Compared to a single NWQD of the same diameter,the fluorescence was enhanced by 1054 and 2916times.The predicted collection efficiencies approach 85%(numerical aperture,NA=0.5)and 80%(NA=0.5),respectively.Unlike single-photon emitters based on bulky conventional optics,this is a unique nanophotonic single-emission photon source based on a line-array configuration that uses a surface plasmon-enhanced design with minimum dissipation.The designs presented in this work will facilitate the development of SPEs with potential integration with semiconductor optoelectronics. | PEIHANG LI PENG YU JIACHEN SUN ZHIMIN JING JIANG WU LUCAS V.BESTEIRO ROBERTO CAPUTO ARUP NEOGI HONGXING XU ZHIMING WANG | 2022 | Photonics Research2022，10，9： | 0 |
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