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|Title:||Nonlinear photoresponse in II-VI-based nanocomposite thin films: a semiquantitative four-level model|
|Publisher:||OPTICAL SOC AMER|
|Citation:||JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 23(4), 692-696|
|Abstract:||We have measured the one-photon, resonant nonlinear optical properties of sputter-deposited nanocomposite CdS:ZnO thin films with a characteristic grain size of about 3 nm. These films show a completely reversible photodarkening at low fluences as well as fast recovery, making them useful for optical limiting applications. The observed photoresponse can be ascribed to excited-state absorption and is in good agreement with a semi-quantitative, four-level model proposed by us. (c) 2006 Optical Society of America.|
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