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Comparative study of absorption efficiency of inclined and vertical InP nanowires
Lund University, Lund, Sweden.
Lund University, Lund, Sweden.
Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS). Lund University, Lund, Sweden.ORCID iD: 0000-0001-5027-1456
2017 (English)In: Physics, Simulation, and Photonic Engineering of Photovoltaic Devices VI / [ed] A. Freundlich, L. Lombez, M. Sugiyama, Bellingham, WA: SPIE - International Society for Optical Engineering, 2017, Vol. 10099, article id UNSP 100990SConference paper, Published paper (Refereed)
Abstract [en]

Geometrically designed III-V nanowire arrays are promising candidates for optoelectronics due to their possibility to excite nanophotonic resonances in absorption spectra. Strong absorption resonances can be obtained by proper tailoring of nanowire diameter, length and pitch. Such enhancement of the light absorption is, however, accompanied by undesired resonance dips at specific wavelengths. In this work, we theoretically show that tilting of the nanowires mitigates the absorption dips by exciting strong Mie resonances. In particular, we derive a theoretical optimum inclination angle of about 30 degrees at which the inclined nanowires gain 8% in absorption efficiency compared to vertically standing nanowires in a spectral region matching the intensity distribution of the sun. The enhancement is due to engineering the excited modes inside the nanowires regarding the symmetry properties of the nanowire/light system without increasing the absorbing material. We expect our results to be important for nanowire-based photovoltaic applications. © 2017 SPIE.

Place, publisher, year, edition, pages
Bellingham, WA: SPIE - International Society for Optical Engineering, 2017. Vol. 10099, article id UNSP 100990S
Series
Proceedings of SPIE, ISSN 0277-786X ; 10099
Keywords [en]
Inclined nanowire arrays, Absorption, Mie modes, Nanophotonics, Photovoltaics
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:hh:diva-35615DOI: 10.1117/12.2249840ISI: 000404908300017Scopus ID: 2-s2.0-85019643025ISBN: 978-1-5106-0640-1 OAI: oai:DiVA.org:hh-35615DiVA, id: diva2:1161969
Conference
Conference on Physics, Simulation, and Photonic Engineering of Photovoltaic Devices VI, San Francisco, CA, USA, Jan. 30-Feb. 1, 2017
Funder
Swedish Research CouncilSwedish Foundation for Strategic Research Knut and Alice Wallenberg Foundation
Note

Funding: NanoLund, the Swedish Research Council (VR), the Swedish Foundation for Strategic Research (SSF), and the Knut and Alice Wallenberg Foundation

Available from: 2017-12-01 Created: 2017-12-01 Last updated: 2018-04-03Bibliographically approved

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