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Low Threshold ZnSe1−x Tex Optical Limiters

Published online by Cambridge University Press:  15 February 2011

W. Ji ,
H. S. Tan ,
Z. C. Feng  and
P. Becla
W. Ji
Affiliation:
Physics Department, National University of Singapore, Lower Kent Ridge Road, Singapore 0511, Republic of Singapore
H. S. Tan
Affiliation:
Physics Department, National University of Singapore, Lower Kent Ridge Road, Singapore 0511, Republic of Singapore
Z. C. Feng
Affiliation:
Physics Department, National University of Singapore, Lower Kent Ridge Road, Singapore 0511, Republic of Singapore
P. Becla
Affiliation:
Massachusetts Institute of Technology, Cambridge, MA02139, USA
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Abstract

We report an experimental investigation of optical limiting with bulk ZnSe1−xTex crystals at wavelengths just below the band edge, using nanosecond laser pulses. The limiting threshold as low as a few mJ/cm2 has been demonstrated. The generation of free charge carriers by singlephoton absorption, and subsequent free-carrier nonlinearities (nonlinear absorption and selfdefocusing) are responsible for the limiting behavior.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 374: Symposia ZB – Materials for Optical Limiting , 1994 , 79
Copyright
Copyright © Materials Research Society 1995

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