Coherence lifetime broadening of an optical transition in a 2 atom diameter HgTe nanowire: a temperature dependent resonance Raman study
Coherence lifetime broadening of an optical transition in a 2 atom diameter HgTe nanowire: a temperature dependent resonance Raman study
This paper presents the results of measurements of the temperature dependence of resonance Raman scattering from 2 atom diameter HgTe nanowires embedded in the central pore of single walled carbon nanotubes, over the temperature range 4–295 K and excitation photon energies in the range 1.65 to 1.90 eV. The spectra are analysed to extract the temperature dependence of the phonon energies and linewidths and the central energy, linewidth and peak scattering strength of the optical resonances. The temperature dependence of the peak scattering strength is explained by a model in which the resonance broadening is dominated by coherence lifetime broadening, allowing us to determine the coherence lifetime of the underlying optical transition: 9 fs at 295 K and 18 fs at 50 K. The results are comparable with similar results on carbon nanotubes which suggests that the optical transitions responsible for the Raman resonances are excitonic
95387-95395
Spencer, Joseph
4ae3c181-002e-491d-a9c3-8936062a49c8
Smith, David C.
d9b2c02d-b7ea-498b-9ea1-208a1681536f
McDonnell, Liam
f55afd9a-aa83-4a34-b3ac-c1b9ff3858b9
Sloan, J.
79bdd478-9258-45fd-a3af-9048fa17d8c1
Kashtiban, R.J.
efae4b1f-dca2-4345-a6b2-ba054e69b3d3
2016
Spencer, Joseph
4ae3c181-002e-491d-a9c3-8936062a49c8
Smith, David C.
d9b2c02d-b7ea-498b-9ea1-208a1681536f
McDonnell, Liam
f55afd9a-aa83-4a34-b3ac-c1b9ff3858b9
Sloan, J.
79bdd478-9258-45fd-a3af-9048fa17d8c1
Kashtiban, R.J.
efae4b1f-dca2-4345-a6b2-ba054e69b3d3
Spencer, Joseph, Smith, David C., McDonnell, Liam, Sloan, J. and Kashtiban, R.J.
(2016)
Coherence lifetime broadening of an optical transition in a 2 atom diameter HgTe nanowire: a temperature dependent resonance Raman study.
RSC Advances, 6 (98), .
(doi:10.1039/C6RA22065G).
Abstract
This paper presents the results of measurements of the temperature dependence of resonance Raman scattering from 2 atom diameter HgTe nanowires embedded in the central pore of single walled carbon nanotubes, over the temperature range 4–295 K and excitation photon energies in the range 1.65 to 1.90 eV. The spectra are analysed to extract the temperature dependence of the phonon energies and linewidths and the central energy, linewidth and peak scattering strength of the optical resonances. The temperature dependence of the peak scattering strength is explained by a model in which the resonance broadening is dominated by coherence lifetime broadening, allowing us to determine the coherence lifetime of the underlying optical transition: 9 fs at 295 K and 18 fs at 50 K. The results are comparable with similar results on carbon nanotubes which suggests that the optical transitions responsible for the Raman resonances are excitonic
Text
NanoScaleArticle_Manuscriptv3.pdf
- Accepted Manuscript
More information
Accepted/In Press date: 21 September 2016
e-pub ahead of print date: 28 September 2016
Published date: 2016
Organisations:
Quantum, Light & Matter Group
Identifiers
Local EPrints ID: 401409
URI: http://eprints.soton.ac.uk/id/eprint/401409
ISSN: 2046-2069
PURE UUID: b9afa4ba-bef5-4709-a248-b4a268618bae
Catalogue record
Date deposited: 17 Oct 2016 10:32
Last modified: 15 Mar 2024 05:58
Export record
Altmetrics
Contributors
Author:
Joseph Spencer
Author:
Liam McDonnell
Author:
J. Sloan
Author:
R.J. Kashtiban
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics