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Dynamical Tuning of Nanowire Lasing Spectra

Zapf, Maximilian; Röder, Robert; Winkler, Karl LU ; Kaden, Lisa; Greil, Johannes; Wille, Marcel; Grundmann, Marius; Schmidt-Grund, Rüdiger; Lugstein, Alois and Ronning, Carsten (2017) In Nano Letters 17(11). p.6637-6643
Abstract

Realizing visionary concepts of integrated photonic circuits, nanospectroscopy, and nanosensing will tremendously benefit from dynamically tunable coherent light sources with lateral dimensions on the subwavelength scale. Therefore, we demonstrate an individual nanowire laser based device which can be gradually tuned by reversible length changes of the nanowire such that uniaxial tensile stress is applied to the respective semiconductor gain material. By straining the device, the spontaneous excitonic emission of the nanowire shifts to lower energies caused by the bandgap reduction of the semiconductor. Moreover, the optical gain spectrum of the nanolaser can be precisely strain-tuned in the high excitation regime. The tuning of the... (More)

Realizing visionary concepts of integrated photonic circuits, nanospectroscopy, and nanosensing will tremendously benefit from dynamically tunable coherent light sources with lateral dimensions on the subwavelength scale. Therefore, we demonstrate an individual nanowire laser based device which can be gradually tuned by reversible length changes of the nanowire such that uniaxial tensile stress is applied to the respective semiconductor gain material. By straining the device, the spontaneous excitonic emission of the nanowire shifts to lower energies caused by the bandgap reduction of the semiconductor. Moreover, the optical gain spectrum of the nanolaser can be precisely strain-tuned in the high excitation regime. The tuning of the emission does not affect the laser threshold of the device, which is very beneficial for practical applications. The applied length change furthermore adjusts the laser resonances inducing a redshift of the longitudinal modes. Thus, this concept of gradually and dynamically tunable nanolasers enables controlling and modulating the coherent emission on the nanoscale without changing macroscopic ambient conditions. This concept holds therefore huge impact on nanophotonic switches and photonic circuit technology.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
bandgap modification, cadmium sulfide, emission tuning, lasing, Nanowire, strain
in
Nano Letters
volume
17
issue
11
pages
7 pages
publisher
The American Chemical Society
external identifiers
  • scopus:85033212076
ISSN
1530-6984
DOI
10.1021/acs.nanolett.7b02589
language
English
LU publication?
yes
id
df8f5108-93a7-4fca-97c0-8db38a66996e
date added to LUP
2018-02-07 12:51:54
date last changed
2019-08-25 05:01:15
@article{df8f5108-93a7-4fca-97c0-8db38a66996e,
  abstract     = {<p>Realizing visionary concepts of integrated photonic circuits, nanospectroscopy, and nanosensing will tremendously benefit from dynamically tunable coherent light sources with lateral dimensions on the subwavelength scale. Therefore, we demonstrate an individual nanowire laser based device which can be gradually tuned by reversible length changes of the nanowire such that uniaxial tensile stress is applied to the respective semiconductor gain material. By straining the device, the spontaneous excitonic emission of the nanowire shifts to lower energies caused by the bandgap reduction of the semiconductor. Moreover, the optical gain spectrum of the nanolaser can be precisely strain-tuned in the high excitation regime. The tuning of the emission does not affect the laser threshold of the device, which is very beneficial for practical applications. The applied length change furthermore adjusts the laser resonances inducing a redshift of the longitudinal modes. Thus, this concept of gradually and dynamically tunable nanolasers enables controlling and modulating the coherent emission on the nanoscale without changing macroscopic ambient conditions. This concept holds therefore huge impact on nanophotonic switches and photonic circuit technology.</p>},
  author       = {Zapf, Maximilian and Röder, Robert and Winkler, Karl and Kaden, Lisa and Greil, Johannes and Wille, Marcel and Grundmann, Marius and Schmidt-Grund, Rüdiger and Lugstein, Alois and Ronning, Carsten},
  issn         = {1530-6984},
  keyword      = {bandgap modification,cadmium sulfide,emission tuning,lasing,Nanowire,strain},
  language     = {eng},
  month        = {11},
  number       = {11},
  pages        = {6637--6643},
  publisher    = {The American Chemical Society},
  series       = {Nano Letters},
  title        = {Dynamical Tuning of Nanowire Lasing Spectra},
  url          = {http://dx.doi.org/10.1021/acs.nanolett.7b02589},
  volume       = {17},
  year         = {2017},
}