Investigation of the role of free-carrier screening during relaxation of carriers excited by femtosecond optical pulses

James E. Bair; J. Peter Krusius

doi:10.1117/12.137692

21 October 1992 Investigation of the role of free-carrier screening during relaxation of carriers excited by femtosecond optical pulses

James E. Bair, J. Peter Krusius

Author Affiliations +

Proceedings Volume 1677, Ultrafast Lasers Probe Phenomena in Semiconductors and Superconductors; (1992) https://doi.org/10.1117/12.137692
Event: Semiconductors '92, 1992, Somerset, NJ, United States

Abstract

The role of free carrier screening, in the ultrafast relaxation of optically excited carriers, is reassessed using the ensemble Monte Carlo technique. The conventional static screening approximation is compared to a new dynamic screening model. Evolution of the nonequilibrium dynamic dielectric function and its consequences for the carrier scattering are examined. It is shown that dynamic screening results in significant enhancement of both the carrier-carrier and polar optic phonon scattering rates. Relaxation times for the dynamic screening model are found to be dramatically shorter than those for the static screening model. Methods of experimentally differentiating between the two models are proposed.

Citation Download Citation

James E. Bair and J. Peter Krusius "Investigation of the role of free-carrier screening during relaxation of carriers excited by femtosecond optical pulses", Proc. SPIE 1677, Ultrafast Lasers Probe Phenomena in Semiconductors and Superconductors, (21 October 1992); https://doi.org/10.1117/12.137692

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