Theoretical modelling of electron transport in InAs/GaAs quantum dot superlattices

Nenad Vukmirović; Zoran Ikonić; Ivana Savić; Dragan Indjin; Paul Harrison

doi:10.1002/pssc.200671550

Theoretical modelling of electron transport in InAs/GaAs quantum dot superlattices

Nenad Vukmirović, Zoran Ikonić, Ivana Savić, Dragan Indjin, Paul Harrison

Research output: Contribution to journal › Conference article › peer-review

Abstract

A theoretical model describing the electron transport in InAs/GaAs quantum dot infrared photodetectors, modelled as ideal quantum dot superlattices, is presented. The carrier wave functions and energy levels were evaluated using the strain dependent 8-band κ · p Hamiltonian and used to calculate all intra- and inter-period transition rates due to interaction with phonons and electromagnetic radiation. The interaction with longitudinal acoustic phonons and electromagnetic radiation was treated perturbatively within the framework of Fermi's golden rule, while the interaction with longitudinal optical phonons was considered taking into account their strong coupling to electrons. The populations of energy levels were then found from a system of rate equations, and the electron current in the superlattice was subsequently extracted.

Original language	English
Pages (from-to)	3770-3773
Number of pages	4
Journal	Physica Status Solidi (C) Current Topics in Solid State Physics
Volume	3
Issue number	11
Early online date	22 Nov 2006
DOIs	https://doi.org/10.1002/pssc.200671550
Publication status	Published - 1 Dec 2006
Externally published	Yes
Event	4th International Conference on Semiconductor Quantum Dots - Chamonix-Mont Blanc, France Duration: 1 May 2006 → 5 May 2006 Conference number: 4

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title = "Theoretical modelling of electron transport in InAs/GaAs quantum dot superlattices",

abstract = "A theoretical model describing the electron transport in InAs/GaAs quantum dot infrared photodetectors, modelled as ideal quantum dot superlattices, is presented. The carrier wave functions and energy levels were evaluated using the strain dependent 8-band κ · p Hamiltonian and used to calculate all intra- and inter-period transition rates due to interaction with phonons and electromagnetic radiation. The interaction with longitudinal acoustic phonons and electromagnetic radiation was treated perturbatively within the framework of Fermi's golden rule, while the interaction with longitudinal optical phonons was considered taking into account their strong coupling to electrons. The populations of energy levels were then found from a system of rate equations, and the electron current in the superlattice was subsequently extracted.",

keywords = "73.21.La, 73.63.Kv, 78.67.Hc, 85.35.Be, 85.60.Gz, Electric conductivity, Electromagnetic wave emission, Electrons",

author = "Nenad Vukmirovi{\'c} and Zoran Ikoni{\'c} and Ivana Savi{\'c} and Dragan Indjin and Paul Harrison",

year = "2006",

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doi = "10.1002/pssc.200671550",

language = "English",

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issn = "1862-6351",

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note = "4th International Conference on Semiconductor Quantum Dots, QD2006 ; Conference date: 01-05-2006 Through 05-05-2006",

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T1 - Theoretical modelling of electron transport in InAs/GaAs quantum dot superlattices

AU - Vukmirović, Nenad

AU - Ikonić, Zoran

AU - Savić, Ivana

AU - Indjin, Dragan

AU - Harrison, Paul

N1 - Conference code: 4

PY - 2006/12/1

Y1 - 2006/12/1

N2 - A theoretical model describing the electron transport in InAs/GaAs quantum dot infrared photodetectors, modelled as ideal quantum dot superlattices, is presented. The carrier wave functions and energy levels were evaluated using the strain dependent 8-band κ · p Hamiltonian and used to calculate all intra- and inter-period transition rates due to interaction with phonons and electromagnetic radiation. The interaction with longitudinal acoustic phonons and electromagnetic radiation was treated perturbatively within the framework of Fermi's golden rule, while the interaction with longitudinal optical phonons was considered taking into account their strong coupling to electrons. The populations of energy levels were then found from a system of rate equations, and the electron current in the superlattice was subsequently extracted.

AB - A theoretical model describing the electron transport in InAs/GaAs quantum dot infrared photodetectors, modelled as ideal quantum dot superlattices, is presented. The carrier wave functions and energy levels were evaluated using the strain dependent 8-band κ · p Hamiltonian and used to calculate all intra- and inter-period transition rates due to interaction with phonons and electromagnetic radiation. The interaction with longitudinal acoustic phonons and electromagnetic radiation was treated perturbatively within the framework of Fermi's golden rule, while the interaction with longitudinal optical phonons was considered taking into account their strong coupling to electrons. The populations of energy levels were then found from a system of rate equations, and the electron current in the superlattice was subsequently extracted.

KW - 73.21.La

KW - 73.63.Kv

KW - 78.67.Hc

KW - 85.35.Be

KW - 85.60.Gz

KW - Electric conductivity

KW - Electromagnetic wave emission

KW - Electrons

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U2 - 10.1002/pssc.200671550

DO - 10.1002/pssc.200671550

M3 - Conference article

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VL - 3

SP - 3770

EP - 3773

JO - Physica Status Solidi C: Conferences

JF - Physica Status Solidi C: Conferences

SN - 1862-6351

IS - 11

T2 - 4th International Conference on Semiconductor Quantum Dots

Y2 - 1 May 2006 through 5 May 2006

ER -

Theoretical modelling of electron transport in InAs/GaAs quantum dot superlattices

Abstract

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