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Coupling of Light into Nanowire Arrays and Subsequent Absorption

Anttu, Nicklas LU and Xu, Hongqi LU (2010) International Conference on Nanoscience and Technology (ChinaNANO 2009) In Journal of Nanoscience And Nanotechnology 10(11). p.7183-7187
Abstract
We present a theoretical study of the absorption of light in periodic arrays of InP nanowires. The absorption in the array depends strongly on the diameter and the length of the nanowires, as well as the period of the array. Nanowires of a length of just 2 Am are able, after an appropriate choice for the other parameters, to absorb more than 90% of the incident energy of TE and TM polarized light, with photon energies almost all the way down to the band gap energy and an incidence angle up to 50 degree. This high total absorption arises from a good coupling of the incident light into the nanowire array at the top interface between air and the array and absorption inside the array before the light reaches the interface between the nanowires... (More)
We present a theoretical study of the absorption of light in periodic arrays of InP nanowires. The absorption in the array depends strongly on the diameter and the length of the nanowires, as well as the period of the array. Nanowires of a length of just 2 Am are able, after an appropriate choice for the other parameters, to absorb more than 90% of the incident energy of TE and TM polarized light, with photon energies almost all the way down to the band gap energy and an incidence angle up to 50 degree. This high total absorption arises from a good coupling of the incident light into the nanowire array at the top interface between air and the array and absorption inside the array before the light reaches the interface between the nanowires and the substrate. We find that for a given photon energy there exists a critical nanowire diameter above which a dramatic increase in the absorption occurs. The critical diameter decreases for increasing photon energies, and is directly related to the dispersion of waveguiding modes in single isolated nanowires. A characterization showed that the absorption characteristics of the nanowire arrays are very promising for photovoltaic applications. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Photovoltaics, Periodic Array, Nanowire, Light Absorption, Semiconductor
in
Journal of Nanoscience And Nanotechnology
volume
10
issue
11
pages
7183 - 7187
publisher
Amer Scientific Publishers
conference name
International Conference on Nanoscience and Technology (ChinaNANO 2009)
external identifiers
  • wos:000283621300042
  • scopus:78650545488
ISSN
1533-4899
1533-4880
DOI
10.1166/jnn.2010.2907
language
English
LU publication?
yes
id
eea9d1ec-8845-4053-9e76-fb3e590ccabd (old id 1719643)
date added to LUP
2010-12-23 09:42:29
date last changed
2018-05-29 11:11:41
@inproceedings{eea9d1ec-8845-4053-9e76-fb3e590ccabd,
  abstract     = {We present a theoretical study of the absorption of light in periodic arrays of InP nanowires. The absorption in the array depends strongly on the diameter and the length of the nanowires, as well as the period of the array. Nanowires of a length of just 2 Am are able, after an appropriate choice for the other parameters, to absorb more than 90% of the incident energy of TE and TM polarized light, with photon energies almost all the way down to the band gap energy and an incidence angle up to 50 degree. This high total absorption arises from a good coupling of the incident light into the nanowire array at the top interface between air and the array and absorption inside the array before the light reaches the interface between the nanowires and the substrate. We find that for a given photon energy there exists a critical nanowire diameter above which a dramatic increase in the absorption occurs. The critical diameter decreases for increasing photon energies, and is directly related to the dispersion of waveguiding modes in single isolated nanowires. A characterization showed that the absorption characteristics of the nanowire arrays are very promising for photovoltaic applications.},
  author       = {Anttu, Nicklas and Xu, Hongqi},
  booktitle    = {Journal of Nanoscience And Nanotechnology},
  issn         = {1533-4899},
  keyword      = {Photovoltaics,Periodic Array,Nanowire,Light Absorption,Semiconductor},
  language     = {eng},
  number       = {11},
  pages        = {7183--7187},
  publisher    = {Amer Scientific Publishers},
  title        = {Coupling of Light into Nanowire Arrays and Subsequent Absorption},
  url          = {http://dx.doi.org/10.1166/jnn.2010.2907},
  volume       = {10},
  year         = {2010},
}