Ultrafast coherent spectroscopy in II-VI widegap semiconductors

A. K. Kar, A. Tookey

Research output: Contribution to journalArticlepeer-review


Exciton interactions in ZnSe-based thin layers and quantum wells have been studied using ultrafast four-wave-mixing. We present results to show the influence of quantum confinement on the exciton - acoustic-phonon scattering rate, and compare the coherence lifetimes of excitons and biexcitons. Using a thin ZnSe layer, we reveal a new signature of quantum beating, namely polarisation-state beating, which in turn reveals the role of excitation-induced dephasing in exciton interactions.

Original languageEnglish
Pages (from-to)192-196
Number of pages5
JournalProceedings of SPIE - the International Society for Optical Engineering
Publication statusPublished - 1999
EventProceedings of the 1998 International Conference on Optics and Optoelectronics - Silver Jubilee Symposium of the Optical Society of India - Dehradum, India
Duration: 9 Dec 199812 Dec 1998


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