Frequency dependent linear and non-linear response properties of electron impurity doped quantum dots: Influence of impurity location

Kanchan Sarkar; Nirmal Kumar Datta; Manas Ghosh

doi:10.1016/j.physe.2010.01.021

Frequency dependent linear and non-linear response properties of electron impurity doped quantum dots: Influence of impurity location

Kanchan Sarkar, Nirmal Kumar Datta, Manas Ghosh

Chemical Engineering and Materials Science

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

9 Scopus citations

Abstract

We explore the pattern of frequency-dependent linear and non-linear optical (NLO) response of electron impurity doped quantum dots harmonically confined in two dimensions. For some fixed values of transverse magnetic field strength (ω_c), and harmonic confinement potential (ω₀), the influence of impurity location (x₀, y₀) on the diagonal components of frequency dependent linear (α_xx and α_yy), and the first (β_xxx and β_yyy) NLO responses of the dot is computed through linear variational route. The non-linear polarizabilities undergo maximization at some typical oscillation frequency of the external field depending upon the impurity location.

Original language	English (US)
Pages (from-to)	1659-1666
Number of pages	8
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	42
Issue number	5
DOIs	https://doi.org/10.1016/j.physe.2010.01.021
State	Published - Mar 2010

Keywords

Frequency dependent polarizability
Impurity doping
Quantum dot

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AB - We explore the pattern of frequency-dependent linear and non-linear optical (NLO) response of electron impurity doped quantum dots harmonically confined in two dimensions. For some fixed values of transverse magnetic field strength (ωc), and harmonic confinement potential (ω0), the influence of impurity location (x0, y0) on the diagonal components of frequency dependent linear (αxx and αyy), and the first (βxxx and βyyy) NLO responses of the dot is computed through linear variational route. The non-linear polarizabilities undergo maximization at some typical oscillation frequency of the external field depending upon the impurity location.

KW - Frequency dependent polarizability

KW - Impurity doping

KW - Quantum dot

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Frequency dependent linear and non-linear response properties of electron impurity doped quantum dots: Influence of impurity location

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