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Proceedings Paper

Comparative study of absorption efficiency of inclined and vertical InP nanowires
Author(s): Mahtab Aghaeipour ; Mats-Erik Pistol; Håkan Pettersson
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Paper Abstract

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° 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.

Paper Details

Date Published: 23 February 2017
PDF: 5 pages
Proc. SPIE 10099, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices VI, 100990S (23 February 2017); doi: 10.1117/12.2249840
Show Author Affiliations
Mahtab Aghaeipour , Lund Univ. (Sweden)
Mats-Erik Pistol, Lund Univ. (Sweden)
Håkan Pettersson, Lund Univ. (Sweden)
Halmstad Univ. (Sweden)

Published in SPIE Proceedings Vol. 10099:
Physics, Simulation, and Photonic Engineering of Photovoltaic Devices VI
Alexandre Freundlich; Laurent Lombez; Masakazu Sugiyama, Editor(s)

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