Effect of photon-assisted absorption on the thermodynamics of hot electrons interacting with an intense optical field in bulk GaAs

The use of a Boltzmann transport equation with a drift term is physically incorrect for optical-field frequencies. Also, the use of a simple energy-balance equation is found to lead to an inaccurate estimation of electron temperature. Therefore, we have established a Boltzmann-scattering equation fo...

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Bibliographic Details
Published in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2005-01, Vol.71 (4), p.045204.1-045204.5, Article 045204
Main Authors: DANHONG HUANG, ALSING, P. M, APOSTOLOVA, T, CARDIMONA, D. A
Format: Article
Language:English
Subjects:
ABSORPTION
BOLTZMANN EQUATION
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Conductivity phenomena in semiconductors and insulators
COULOMB SCATTERING
ELECTRON TEMPERATURE
ELECTRON-PHONON COUPLING
Electronic transport in condensed matter
ELECTRONS
ENERGY BALANCE
Exact sciences and technology
GALLIUM ARSENIDES
High-field and nonlinear effects
IMPURITIES
PHONONS
PHOTONS
Physics
SEMICONDUCTOR MATERIALS
THERMODYNAMICS
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Summary:The use of a Boltzmann transport equation with a drift term is physically incorrect for optical-field frequencies. Also, the use of a simple energy-balance equation is found to lead to an inaccurate estimation of electron temperature. Therefore, we have established a Boltzmann-scattering equation for the accurate description of the relative scattering motion of electrons interacting with an incident optical field by including impurity- and phonon-assisted photon absorption as well as Coulomb scattering between two electrons. Multiple peaks on the high-energy tail of a Fermi-Dirac distribution are predicted and the effect of pair scattering is analyzed. Moreover, the effective electron temperature is calculated as a function of both the incident-field amplitude and the photon energy so that the thermodynamics of hot electrons may be investigated.
ISSN:1098-0121
1550-235X
DOI:10.1103/PhysRevB.71.045204