Effect of confinement on the lifetimes of shallow impurity states in quantum wells

Ekaterina E. Orlova; Paul Harrison

doi:10.1063/1.1831555

Effect of confinement on the lifetimes of shallow impurity states in quantum wells

Ekaterina E. Orlova, Paul Harrison

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

The effect of confinement in quantum well on the lifetimes of excited shallow impurity states is theoretically investigated. It is shown that quantum well potential causes a slower asymptotic behavior of the wave functions at large wave vectors (q^-3) and may lead to an exponential increase of the transition rates due to interaction with short wavelength (λ ≪a_B) acoustic phonons. The model explains experimentally observed reduction of lifetimes of impurity states in quantum wells and allows us to predict the parameters of quantum wells to maximize impurity states lifetimes.

Original language	English
Pages (from-to)	5257-5259
Number of pages	3
Journal	Applied Physics Letters
Volume	85
Issue number	22
DOIs	https://doi.org/10.1063/1.1831555
Publication status	Published - 29 Nov 2004
Externally published	Yes

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title = "Effect of confinement on the lifetimes of shallow impurity states in quantum wells",

abstract = "The effect of confinement in quantum well on the lifetimes of excited shallow impurity states is theoretically investigated. It is shown that quantum well potential causes a slower asymptotic behavior of the wave functions at large wave vectors (q-3) and may lead to an exponential increase of the transition rates due to interaction with short wavelength (λ ≪aB) acoustic phonons. The model explains experimentally observed reduction of lifetimes of impurity states in quantum wells and allows us to predict the parameters of quantum wells to maximize impurity states lifetimes.",

keywords = "Crystal impurities, Energy gap, Heterojunctions, Mathematical models, Parameter estimation, Phonons, Vectors",

author = "Orlova, {Ekaterina E.} and Paul Harrison",

note = "Funding Information: The authors acknowledge discussions with M. P. Halsall and W.-M. Cheng; EPSRC Grant No. GR∕N65639∕01, Royal Society∕Nato Fellowship, and RFBR Grant No. 03-02-16586.",

year = "2004",

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doi = "10.1063/1.1831555",

language = "English",

volume = "85",

pages = "5257--5259",

journal = "Applied Physics Letters",

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T1 - Effect of confinement on the lifetimes of shallow impurity states in quantum wells

AU - Orlova, Ekaterina E.

AU - Harrison, Paul

N1 - Funding Information: The authors acknowledge discussions with M. P. Halsall and W.-M. Cheng; EPSRC Grant No. GR∕N65639∕01, Royal Society∕Nato Fellowship, and RFBR Grant No. 03-02-16586.

PY - 2004/11/29

Y1 - 2004/11/29

N2 - The effect of confinement in quantum well on the lifetimes of excited shallow impurity states is theoretically investigated. It is shown that quantum well potential causes a slower asymptotic behavior of the wave functions at large wave vectors (q-3) and may lead to an exponential increase of the transition rates due to interaction with short wavelength (λ ≪aB) acoustic phonons. The model explains experimentally observed reduction of lifetimes of impurity states in quantum wells and allows us to predict the parameters of quantum wells to maximize impurity states lifetimes.

AB - The effect of confinement in quantum well on the lifetimes of excited shallow impurity states is theoretically investigated. It is shown that quantum well potential causes a slower asymptotic behavior of the wave functions at large wave vectors (q-3) and may lead to an exponential increase of the transition rates due to interaction with short wavelength (λ ≪aB) acoustic phonons. The model explains experimentally observed reduction of lifetimes of impurity states in quantum wells and allows us to predict the parameters of quantum wells to maximize impurity states lifetimes.

KW - Crystal impurities

KW - Energy gap

KW - Heterojunctions

KW - Mathematical models

KW - Parameter estimation

KW - Phonons

KW - Vectors

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DO - 10.1063/1.1831555

M3 - Article

AN - SCOPUS:11044226980

VL - 85

SP - 5257

EP - 5259

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 22

ER -

Effect of confinement on the lifetimes of shallow impurity states in quantum wells

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