Abstract
Advances in femtosecond optical pulse techniques have provided a unique opportunity to excite and probe nonthermal population distributions in semiconductors and complex molecular systems. In this talk we will review the current state of high resolution femtosecond and high repetition rate optical pulse techniques and application to the dynamics of nonthermal excitations. Using nigh resolution time resolved absorption spectra we have been able to observe the time evolution of a nearly monoenergetic population of carriers in a semiconductor, excited with a short optical pulse, to a carrier distribution in which a temperature can be defined. In GaAs this process is observed to take place within 150 femtoseconds following excitation. In addition we will discuss measurements of spectral hole burning in a large molecule resulting from excitation of a nonequilibrium distribution of molecules excited by a femtosecond optical pulse.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
