Excitonic and free-carrier quantum beats created by femtosecond excitation at the band edge of GaAs

Autor:	H. Kostial, M. Joschko, Michael P. Hasselbeck, Thomas Elsaesser, Rudolf Hey, K. H. Ploog, Michael Woerner
Rok vydání:	1998
Předmět:	Femtosecond pulse shaping Physics Crystal Quantum beats business.industry Femtosecond Continuum (design consultancy) Optoelectronics Atomic physics Polarization (waves) business Ultrashort pulse Excitation
Zdroj:	Physical Review B. 58:10470-10474
ISSN:	1095-3795 0163-1829
DOI:	10.1103/physrevb.58.10470
Popis:	The coherent optical response of bulk GaAs is studied after ultrafast excitation close to the band edge. Pump-probe experiments with 20-fs pulses demonstrate that coherent polarizations between heavy- and light-hole continuum states make a strong contribution to the nonlinear optical response. The beat frequency is determined by the heavy-hole--light-hole energy splitting in the spectral probe window. In addition, excitonic heavy-hole--light-hole quantum beats are observed in the slightly strained GaAs crystal. The different contributions are separated via their polarization selection rules.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3c80e2dcc6673622f153218589a04fd6 https://doi.org/10.1103/physrevb.58.10470 Zobrazit plný text záznamu