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Comparative study of absorption efficiency of inclined and vertical InP nanowires

Aghaeipour, Mahtab LU ; Pistol, Mats Erik LU and Pettersson, Håkan LU (2017) Physics, Simulation, and Photonic Engineering of Photovoltaic Devices VI 2017 In Physics, Simulation, and Photonic Engineering of Photovoltaic Devices VI 2017 10099.
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... (More)

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.

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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Absorption, Inclined nanowire arrays, Mie modes, Nanophotonics, Photovoltaics
in
Physics, Simulation, and Photonic Engineering of Photovoltaic Devices VI 2017
volume
10099
publisher
SPIE
conference name
Physics, Simulation, and Photonic Engineering of Photovoltaic Devices VI 2017
external identifiers
  • scopus:85019643025
DOI
10.1117/12.2249840
language
English
LU publication?
yes
id
c4f42d28-b0c1-4998-8aa8-b2c14952dd3d
date added to LUP
2017-06-13 11:26:05
date last changed
2017-06-13 11:26:05
@inproceedings{c4f42d28-b0c1-4998-8aa8-b2c14952dd3d,
  abstract     = {<p>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.</p>},
  author       = {Aghaeipour, Mahtab and Pistol, Mats Erik and Pettersson, Håkan},
  booktitle    = {Physics, Simulation, and Photonic Engineering of Photovoltaic Devices VI 2017},
  keyword      = {Absorption,Inclined nanowire arrays,Mie modes,Nanophotonics,Photovoltaics},
  language     = {eng},
  publisher    = {SPIE},
  title        = {Comparative study of absorption efficiency of inclined and vertical InP nanowires},
  url          = {http://dx.doi.org/10.1117/12.2249840},
  volume       = {10099},
  year         = {2017},
}