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Volume :28 Issue : 2 2001      Add To Cart                                                                    Download

A photoconductive film evaluated as an optical resonator

Auther : K. H. HERRMANN AND FIKRY EL-AKKAD*

Faculty of Science, Department of Physics, Kuwait University, P Box 5969 Safat, 13060 Kuwait

*corresponding author, e-mail: elakkad@kuc01.kuniv.edu.kw, Fax: (00965) 481 1188

ABSTRACT 

Oscillations in the spectral photoresponse of a semiconducting thin film with the period of geometrical cavity resonance are made visible by a wide overlap between the photosensitive interband range and the transparency range in CdS. This becomes possible due to enhanced absorption edge broadening in a polycrystalline film. A quantitative fit of the modulation depth of the oscillations in both transmittance and photoresponse is given in terms of resonator optics and semiconductor parameters.

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