High-temperature efficiency of exciton-polariton processes in semiconductors and 2D systems

G. N. Aliev; O. S. Coschug-Toates; Vladimir A. Kosobukin; Ruben P. Seisyan; S. A. Vaganov

doi:10.1117/12.200989

9 February 1995 High-temperature efficiency of exciton-polariton processes in semiconductors and 2D systems

G. N. Aliev, O. S. Coschug-Toates, Vladimir A. Kosobukin, Ruben P. Seisyan, S. A. Vaganov

Proceedings Volume 2362, International Conference on Excitonic Processes in Condensed Matter; (1995) https://doi.org/10.1117/12.200989
Event: Excitonic Processes in Condensed Matter: International Conference, 1994, Darwin, Australia

Abstract

The absorption-edge spectra have been studied in the temperature range from 4 to 300 K for single-crystal CdTe, ZnTe, GaAs wafers and GaAs/(Al,Ga)As multiple quantum well (MQW) structures. In all cases the frequency integrated absorption coefficient K is found to increase monotonously with temperature T up to T equals T* and to keep constant above T*. The temperatures T*, depending on semiconducting materials, might be considered as critical ones corresponding to a change in polaritonic energy transport mechanism due to the lack of spatial dispersion at T > T*. It was shown, that though the measured temperature T* approximately 102 K correspond to much larger linewidths than could be explained by using the theoretical value of the exciton damping parameter, this discrepancy can be overcome if a temperature-dependent inhomogeneous broadening is taken into account consistently. A similar temperature dependence of K with T* approximately equals 20 K has been observed for the first time in GaAs/(Al,Ga)As MQW-structures.

Citation Download Citation

G. N. Aliev, O. S. Coschug-Toates, Vladimir A. Kosobukin, Ruben P. Seisyan, and S. A. Vaganov "High-temperature efficiency of exciton-polariton processes in semiconductors and 2D systems", Proc. SPIE 2362, International Conference on Excitonic Processes in Condensed Matter, (9 February 1995); https://doi.org/10.1117/12.200989

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available