標題: Near-resonant high order nonlinear absorption of ZnO thin films
作者: Chan, Yun-Pei
Lin, Ja-Hon
Hsu, Chih-Chang
Hsieh, Wen-Feng
光電工程學系
Department of Photonics
公開日期: 24-十一月-2008
摘要: Nonlinear optical absorption of ZnO thin film grown by the laser molecular beam epitaxy was investigated by the Z-scan method using a frequency-doubled femtosecond Ti:sapphire laser. Due to near-exciton resonance, an enormous enhancement of two photon absorption (TPA) is about 3000 cm/GW at 390 nm which is about 6.5 times larger than the previously reported at two-photon exciton resonance in near-IR regime and 710 times larger than that of ZnO bulk measured at 532 nm. Besides, the free-carrier absorption resulting from linear absorption and TPA becomes essential when the excitation approaches the exciton resonance. (C) 2008 Optical Society of America
URI: http://dx.doi.org/10.1364/OE.16.019900
http://hdl.handle.net/11536/8138
ISSN: 1094-4087
DOI: 10.1364/OE.16.019900
期刊: OPTICS EXPRESS
Volume: 16
Issue: 24
起始頁: 19900
結束頁: 19908
顯示於類別:期刊論文


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