Temperature of quasi-two-dimensional electron gases under steady-state terahertz drive

N. G. Asmar; J. Černe; A. G. Markelz; E. G. Gwinn; M. S. Sherwin; K. L. Campman; A. C. Gossard

doi:10.1063/1.116547

Temperature of quasi-two-dimensional electron gases under steady-state terahertz drive

N. G. Asmar
, J. Černe
, A. G. Markelz
, E. G. Gwinn
, M. S. Sherwin
, K. L. Campman
, A. C. Gossard

Physics

University of California at Santa Barbara

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

64 Scopus citations

Abstract

We use photoluminescence to study the time-average energy distribution of electrons in the presence of strong steady-state drive at terahertz (THz) frequencies, in a modulation-doped 125 Å AlGaAs/GaAs square well that is held at low lattice temperature TL. We find that the energy distribution can be characterized by an effective electron temperature, Te(≳TL), that agrees well with values estimated from the THz-illuminated, dc conductivity. This agreement indicates that under strong THz drive, LO phonon scattering dominates both energy and momentum relaxation; that the carrier distribution maintains a heated, thermal form; and that phonon drift effects are negligible.

Original language	English
Pages (from-to)	829-831
Number of pages	3
Journal	Applied Physics Letters
Volume	68
Issue number	6
DOIs	https://doi.org/10.1063/1.116547
State	Published - 1996

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@article{18ea3cbb7d0140b1a47c6b4897f430e9,

title = "Temperature of quasi-two-dimensional electron gases under steady-state terahertz drive",

abstract = "We use photoluminescence to study the time-average energy distribution of electrons in the presence of strong steady-state drive at terahertz (THz) frequencies, in a modulation-doped 125 {\AA} AlGaAs/GaAs square well that is held at low lattice temperature TL. We find that the energy distribution can be characterized by an effective electron temperature, Te(≳TL), that agrees well with values estimated from the THz-illuminated, dc conductivity. This agreement indicates that under strong THz drive, LO phonon scattering dominates both energy and momentum relaxation; that the carrier distribution maintains a heated, thermal form; and that phonon drift effects are negligible.",

author = "Asmar, \{N. G.\} and J. {\v C}erne and Markelz, \{A. G.\} and Gwinn, \{E. G.\} and Sherwin, \{M. S.\} and Campman, \{K. L.\} and Gossard, \{A. C.\}",

year = "1996",

doi = "10.1063/1.116547",

language = "English",

volume = "68",

pages = "829--831",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

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TY - JOUR

T1 - Temperature of quasi-two-dimensional electron gases under steady-state terahertz drive

AU - Asmar, N. G.

AU - Černe, J.

AU - Markelz, A. G.

AU - Gwinn, E. G.

AU - Sherwin, M. S.

AU - Campman, K. L.

AU - Gossard, A. C.

PY - 1996

Y1 - 1996

N2 - We use photoluminescence to study the time-average energy distribution of electrons in the presence of strong steady-state drive at terahertz (THz) frequencies, in a modulation-doped 125 Å AlGaAs/GaAs square well that is held at low lattice temperature TL. We find that the energy distribution can be characterized by an effective electron temperature, Te(≳TL), that agrees well with values estimated from the THz-illuminated, dc conductivity. This agreement indicates that under strong THz drive, LO phonon scattering dominates both energy and momentum relaxation; that the carrier distribution maintains a heated, thermal form; and that phonon drift effects are negligible.

AB - We use photoluminescence to study the time-average energy distribution of electrons in the presence of strong steady-state drive at terahertz (THz) frequencies, in a modulation-doped 125 Å AlGaAs/GaAs square well that is held at low lattice temperature TL. We find that the energy distribution can be characterized by an effective electron temperature, Te(≳TL), that agrees well with values estimated from the THz-illuminated, dc conductivity. This agreement indicates that under strong THz drive, LO phonon scattering dominates both energy and momentum relaxation; that the carrier distribution maintains a heated, thermal form; and that phonon drift effects are negligible.

UR - https://www.scopus.com/pages/publications/0000955239

U2 - 10.1063/1.116547

DO - 10.1063/1.116547

M3 - Article

AN - SCOPUS:0000955239

SN - 0003-6951

VL - 68

SP - 829

EP - 831

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 6

ER -

Temperature of quasi-two-dimensional electron gases under steady-state terahertz drive

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