THz intersubband dynamics in p-Si/SiGe quantum well structures

C. R. Pidgeon; P. Murzyn; J. P. R. Wells; I. V. Bradley; Z. Ikonic; R. W. Kelsall; P. Harrison; S. A. Lynch; D. J. Paul; D. D. Arnone; D. J. Robbins; D. Norris; A. G. Cullis

doi:10.1016/S1386-9477(02)00231-X

THz intersubband dynamics in p-Si/SiGe quantum well structures

C. R. Pidgeon, P. Murzyn, J. P. R. Wells, I. V. Bradley, Z. Ikonic, R. W. Kelsall, P. Harrison, S. A. Lynch, D. J. Paul, D. D. Arnone, D. J. Robbins, D. Norris, A. G. Cullis

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Abstract

We report time-resolved (ps) studies of the dynamics of intersubband transitions in p-Si/SiGe multi-quantum well structures in the FIR regime, ℏω < ℏω_LO, utilizing the Dutch free electron laser, FELIX. The calculated scattering rates 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 Si_0.7Ge_0.3 wells.

Original language	English
Pages (from-to)	904-907
Number of pages	4
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	13
Issue number	2-4
Early online date	25 Jan 2002
DOIs	https://doi.org/10.1016/S1386-9477(02)00231-X
Publication status	Published - 1 Mar 2002
Externally published	Yes

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Pidgeon, C. R., Murzyn, P., Wells, J. P. R., Bradley, I. V., Ikonic, Z., Kelsall, R. W., Harrison, P., Lynch, S. A., Paul, D. J., Arnone, D. D., Robbins, D. J., Norris, D., & Cullis, A. G. (2002). THz intersubband dynamics in p-Si/SiGe quantum well structures. Physica E: Low-Dimensional Systems and Nanostructures, 13(2-4), 904-907. https://doi.org/10.1016/S1386-9477(02)00231-X

@article{68aec5d3c8e740e3bc1fe94deba1f210,

title = "THz intersubband dynamics in p-Si/SiGe quantum well structures",

abstract = "We report time-resolved (ps) studies of the dynamics of intersubband transitions in p-Si/SiGe multi-quantum well structures in the FIR regime, ℏω < ℏωLO, utilizing the Dutch free electron laser, FELIX. The calculated scattering rates 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.",

keywords = "Alloy scattering, Intersubband absorption, Si/SiGe",

author = "Pidgeon, {C. R.} and P. Murzyn and Wells, {J. P. R.} and Bradley, {I. V.} and Z. Ikonic and Kelsall, {R. W.} and P. Harrison and Lynch, {S. A.} and Paul, {D. J.} and Arnone, {D. D.} and Robbins, {D. J.} and D. Norris and Cullis, {A. G.}",

note = "Funding Information: This Si/SiGe programme is funded by DARPA on the USAF contract F-19628-99-C-0074. We are grateful to EPSRC (UK) for support as part of the UK programme at FELIX and are grateful for the skillful assistance of Dr A F G van der Meer.",

year = "2002",

month = mar,

day = "1",

doi = "10.1016/S1386-9477(02)00231-X",

language = "English",

volume = "13",

pages = "904--907",

journal = "Physica E: Low-Dimensional Systems and Nanostructures",

issn = "1386-9477",

publisher = "Elsevier",

number = "2-4",

}

TY - JOUR

T1 - THz intersubband dynamics in p-Si/SiGe quantum well structures

AU - Pidgeon, C. R.

AU - Murzyn, P.

AU - Wells, J. P. R.

AU - Bradley, I. V.

AU - Ikonic, Z.

AU - Kelsall, R. W.

AU - Harrison, P.

AU - Lynch, S. A.

AU - Paul, D. J.

AU - Arnone, D. D.

AU - Robbins, D. J.

AU - Norris, D.

AU - Cullis, A. G.

N1 - Funding Information: This Si/SiGe programme is funded by DARPA on the USAF contract F-19628-99-C-0074. We are grateful to EPSRC (UK) for support as part of the UK programme at FELIX and are grateful for the skillful assistance of Dr A F G van der Meer.

PY - 2002/3/1

Y1 - 2002/3/1

N2 - We report time-resolved (ps) studies of the dynamics of intersubband transitions in p-Si/SiGe multi-quantum well structures in the FIR regime, ℏω < ℏωLO, utilizing the Dutch free electron laser, FELIX. The calculated scattering rates 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.

AB - We report time-resolved (ps) studies of the dynamics of intersubband transitions in p-Si/SiGe multi-quantum well structures in the FIR regime, ℏω < ℏωLO, utilizing the Dutch free electron laser, FELIX. The calculated scattering rates 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.

KW - Alloy scattering

KW - Intersubband absorption

KW - Si/SiGe

UR - http://www.scopus.com/inward/record.url?scp=0036492702&partnerID=8YFLogxK

U2 - 10.1016/S1386-9477(02)00231-X

DO - 10.1016/S1386-9477(02)00231-X

M3 - Article

AN - SCOPUS:0036492702

VL - 13

SP - 904

EP - 907

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

SN - 1386-9477

IS - 2-4

ER -

THz intersubband dynamics in p-Si/SiGe quantum well structures

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