Picosecond intersubband dynamics in p-Si/SiGe quantum-well emitter structures

P. Murzyn; C. R. Pidgeon; 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:10.1063/1.1452794

Picosecond intersubband dynamics in p-Si/SiGe quantum-well emitter structures

P. Murzyn, C. R. Pidgeon, 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 multiquantum-well structures in the far-infrared (FIR) regime, ω<ω_LO, 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 Si _0.7Ge_0.3 wells.

Original language	English
Pages (from-to)	1456-1458
Number of pages	3
Journal	Applied Physics Letters
Volume	80
Issue number	8
Early online date	22 Feb 2002
DOIs	https://doi.org/10.1063/1.1452794
Publication status	Published - 25 Feb 2002
Externally published	Yes

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

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, ω<ωLO, 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 Si 0.7Ge0.3 wells.",

keywords = "Acoustic spectroscopy, Dynamics, Electrons, Free electron lasers, Germanium, Infrared radiation, Scattering",

author = "P. Murzyn and Pidgeon, {C. R.} 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.}",

year = "2002",

month = feb,

day = "25",

doi = "10.1063/1.1452794",

language = "English",

volume = "80",

pages = "1456--1458",

journal = "Applied Physics Letters",

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

AU - Murzyn, P.

AU - Pidgeon, C. R.

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.

PY - 2002/2/25

Y1 - 2002/2/25

N2 - 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, ω<ωLO, 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 Si 0.7Ge0.3 wells.

AB - 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, ω<ωLO, 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 Si 0.7Ge0.3 wells.

KW - Acoustic spectroscopy

KW - Dynamics

KW - Electrons

KW - Free electron lasers

KW - Germanium

KW - Infrared radiation

KW - Scattering

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U2 - 10.1063/1.1452794

DO - 10.1063/1.1452794

M3 - Article

AN - SCOPUS:79956033784

VL - 80

SP - 1456

EP - 1458

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 8

ER -

Picosecond intersubband dynamics in p-Si/SiGe quantum-well emitter structures

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