Many-body dynamics and energy relaxation times in a wide semiconductor quantum well as probed by nonlinear far-infrared absorption

Conference · Sun Dec 31 00:00:00 EST 1995

OSTI ID:238880

Sherwin, M S; Craig, K; Unterrainer, K ^[1]

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1. Univ. of California, Santa Barbara, CA (United States); and others

In quantum wells, absorption between the quantized subbands of the conduction band does not take place at the difference of the subband energies; the interactions of the electrons shift the intersubband absorption to higher frequency; this is called the depolarization shift. This shift can be thought of as a dynamic screening effect, and depends upon the difference in population between the subbands of interest. These are the first group of measurements of the dynamics of the depolarization shift, and they offer the possibility of both increased understanding of many-body interactions in real systems, and the possibility of novel quasi-optical devices operating in the far-infared (FIR).

• Research Organization: Brookhaven National Lab. (BNL), Upton, NY (United States)
• OSTI ID: 238880
• Report Number(s): BNL-61982-Absts.; CONF-9508156-Absts.; ON: DE96002729; TRN: 96:013373
• Resource Relation: Conference: 17. international free electron laser conference, New York, NY (United States), 21-25 Aug 1995; Other Information: PBD: [1995]; Related Information: Is Part Of 17th international free electron laser conference and 2nd international FEL users` workshop. Program and abstracts; PB: 300 p.
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
FAR INFRARED RADIATION
ABSORPTION
GALLIUM ARSENIDES
PHOTON COLLISIONS
MANY-BODY PROBLEM
FREE ELECTRON LASERS
FREQUENCY DEPENDENCE