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Crystal Phase-Dependent Nanophotonic Resonances in InAs Nanowire Arrays

Anttu, Nicklas LU ; Lehmann, Sebastian LU ; Storm, Kristian LU ; Dick Thelander, Kimberly LU ; Samuelson, Lars LU ; Wu, Phillip LU and Pistol, Mats-Erik LU (2014) In Nano Letters 14(10). p.5650-5655
Abstract
Nanostructures have many material, electronic, and optical properties that are not found in bulk systems and that are relevant for technological applications. For example, nanowires realized from III-V semiconductors can be grown into wurtzite crystal structure. This crystal structure does not naturally exist in bulk where these materials form the zinc-blende counterpart. Being able to concomitantly grow these nanowires in the zinc-blende and/or wurtzite crystal structure prlovides an important degree of control for the design and optimization of optoelectronic applications based on these semiconductor nanostructures. However, the refractive indices of this new crystallographic phase have so far not been elucidated. This shortcoming makes... (More)
Nanostructures have many material, electronic, and optical properties that are not found in bulk systems and that are relevant for technological applications. For example, nanowires realized from III-V semiconductors can be grown into wurtzite crystal structure. This crystal structure does not naturally exist in bulk where these materials form the zinc-blende counterpart. Being able to concomitantly grow these nanowires in the zinc-blende and/or wurtzite crystal structure prlovides an important degree of control for the design and optimization of optoelectronic applications based on these semiconductor nanostructures. However, the refractive indices of this new crystallographic phase have so far not been elucidated. This shortcoming makes it impossible to predict and utilize he full potential of these new nanostructured materials for optoelectronics applications a careful design and optimization of optical resonances by tuning the nanostrucuted geometry is needed to achieve optimal performance. Here, we report and analyze striking differeences in the optical response of nanophotonic resonances in wurtzite and zinc-blend InAs nanowire arrays. Specifically, through reflectance measurements we find that the resonance can be tuned down to lambda approximate to 380 nm in wurtzite nanowires by decreasing the nanowire diameter. In stark contrast, a similar tuning to below approximate to 500 nm is not possible in the zinc-blende nanowires. Furthermore, we find that the wurtzite nanowires can absorb twice as strongly as the zinc-blende nanowires. We attribute these strikingly large differences in resonant behavior to large differences between the refractive indices of the two crystallographic phases realized in these nanostructures. We anticipate our finding to be relevant for other III-B materials as well as for all material systems that manifest polytypism. Taken together, our results demonstrate crystal phase engineering as a potentially new design dimension for optoelectronics applications. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
InAs nanowire array, nanophotonic resonance, zinc-blende, wurtzite
in
Nano Letters
volume
14
issue
10
pages
5650 - 5655
publisher
The American Chemical Society
external identifiers
  • wos:000343016400027
  • scopus:84907867565
ISSN
1530-6992
DOI
10.1021/nl502306x
language
English
LU publication?
yes
id
a1277b08-91df-4246-9a63-eab4097352ae (old id 4787467)
date added to LUP
2014-11-21 12:33:54
date last changed
2017-10-29 04:05:56
@article{a1277b08-91df-4246-9a63-eab4097352ae,
  abstract     = {Nanostructures have many material, electronic, and optical properties that are not found in bulk systems and that are relevant for technological applications. For example, nanowires realized from III-V semiconductors can be grown into wurtzite crystal structure. This crystal structure does not naturally exist in bulk where these materials form the zinc-blende counterpart. Being able to concomitantly grow these nanowires in the zinc-blende and/or wurtzite crystal structure prlovides an important degree of control for the design and optimization of optoelectronic applications based on these semiconductor nanostructures. However, the refractive indices of this new crystallographic phase have so far not been elucidated. This shortcoming makes it impossible to predict and utilize he full potential of these new nanostructured materials for optoelectronics applications a careful design and optimization of optical resonances by tuning the nanostrucuted geometry is needed to achieve optimal performance. Here, we report and analyze striking differeences in the optical response of nanophotonic resonances in wurtzite and zinc-blend InAs nanowire arrays. Specifically, through reflectance measurements we find that the resonance can be tuned down to lambda approximate to 380 nm in wurtzite nanowires by decreasing the nanowire diameter. In stark contrast, a similar tuning to below approximate to 500 nm is not possible in the zinc-blende nanowires. Furthermore, we find that the wurtzite nanowires can absorb twice as strongly as the zinc-blende nanowires. We attribute these strikingly large differences in resonant behavior to large differences between the refractive indices of the two crystallographic phases realized in these nanostructures. We anticipate our finding to be relevant for other III-B materials as well as for all material systems that manifest polytypism. Taken together, our results demonstrate crystal phase engineering as a potentially new design dimension for optoelectronics applications.},
  author       = {Anttu, Nicklas and Lehmann, Sebastian and Storm, Kristian and Dick Thelander, Kimberly and Samuelson, Lars and Wu, Phillip and Pistol, Mats-Erik},
  issn         = {1530-6992},
  keyword      = {InAs nanowire array,nanophotonic resonance,zinc-blende,wurtzite},
  language     = {eng},
  number       = {10},
  pages        = {5650--5655},
  publisher    = {The American Chemical Society},
  series       = {Nano Letters},
  title        = {Crystal Phase-Dependent Nanophotonic Resonances in InAs Nanowire Arrays},
  url          = {http://dx.doi.org/10.1021/nl502306x},
  volume       = {14},
  year         = {2014},
}