Murzyn, P., Pidgeon, C. R., Wells, J.-P. R., Bradley, I. V., Ikonic, Z., Kelsall, R. W., Harrison, P., Lynch, Stephen Anthony  ORCID: https://orcid.org/0000-0001-9818-2284, Paul, D. J., Arnone, D. D., Robbins, D. J., Norris, D. and Cullis, A. G.
2002.
Picosecond intersubband dynamics in p-Si/SiGe quantum-well emitter structures.
Applied Physics Letters
80
(8)
, 1456.
10.1063/1.1452794
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Abstract
We report time-resolved (ps) studies of the dynamics of intersubband transitions in p-Si/SiGe multiquantum-well structures in the far-infrared (FIR) regime, ℏω<ℏωLO, utilizing the Dutch free electron laser, (entitled FELIX—free electron laser for infrared radiation). The calculated scattering rates for optic and acoustic phonon, and alloy scattering have been included in a rate equation model of the transient FIR intersubband absorption, and show excellent agreement with our degenerate pump-probe spectroscopy measurements where, after an initial rise time determined by the resolution of our measurement, we determine a decay time of ∼10 ps. This is found to be approximately constant in the temperature range from 4 to 100 K, in good agreement with the predictions of alloy scattering in the Si0.7Ge0.3 wells.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Physics and Astronomy |
| Subjects: | Q Science > QC Physics |
| Additional Information: | 3 Page Article. Pdf uploaded in accordance with publisher's policy at http://www.sherpa.ac.uk/romeo/issn/0003-6951/ (accessed 21/02/2014). |
| Publisher: | American Institute of Physics |
| ISSN: | 0003-6951 |
| Date of First Compliant Deposit: | 30 March 2016 |
| Last Modified: | 08 May 2023 22:57 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/25315 |
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