Nonequilibrium electron leakage in terahertz quantum cascade structures
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Authors
Freeman, Will
Karunasiri, Gamani
Subjects
Advisors
Date of Issue
2012
Date
Publisher
American Physical Society
Language
Abstract
The nonequilibrium absorption of longitudinal-optical phonons by hot electrons are suited in terahertz quantum cascade structures. We present a method for including electron leakage to the continuum that take into account the mobility of the electrons. This is incorporated into a density matrix Monte Carlo method that includes to optical field within the resonant cavity. The effects of electron leakage to the continuum as a function of lattice temperature are discussed. Results are compared with the experiment and found to be consistent. It is shown that using only confined wave function and thereby neglecting the leakage via tunneling is inadequate for describing the electron transport.
Type
Article
Description
The article of record as published may be found at http://dx.doi.org/10.1103/PhysRevB.85.195326
Series/Report No
Department
Physics
Organization
Naval Postgraduate School (U.S.)
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NPS Report Number
Sponsors
This work is in part aupported by ONR through the ILIR Program. One of us (GK) would like to acknowledge the support from an ONR grant.
Funder
Format
6 p.
Citation
Physical Review B, v.85, 2012, pp. 195326-1 - 195326-6
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.