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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/4337

Title: Fast and reversible excited state absorption in II-VI-based nanocomposite thin films
Authors: VASA, P
AYYUB, P
SINGH, BP
Keywords: semiconductor-doped glasses
nanocrystals
Issue Date: 2005
Publisher: AMER INST PHYSICS
Citation: APPLIED PHYSICS LETTERS, 87(6), -
Abstract: Nanocomposite CdS-ZnO thin films deposited directly on quartz substrates by high-pressure magnetron sputtering show a completely reversible photodarkening at a very low threshold intensity (similar to 1 kWcm(-2)), and a moderately fast recovery time (< 1 ms). This makes them ideal in optical limiting applications for both continuous wave as well as high rep-rate pulsed lasers. The same system also shows an intensity-dependent quenching of the photoluminescence. Using a pump-probe experiment, we show that photodarkening in such a quantum-dot thin film originates from excited state absorption. (c) 2005
URI: http://dx.doi.org/10.1063/1.2007871
http://dspace.library.iitb.ac.in/xmlui/handle/10054/4337
http://hdl.handle.net/10054/4337
ISSN: 0003-6951
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