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Proceedings Paper

Investigation on nonlinear dynamics of ZnO using time-resolved pump-probe technique with phase object
Author(s): Lirong Ge; Min Shui; Xiao Jin; Zhongguo Li; Yinglin Song
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Paper Abstract

The nonlinear absorptive and refractive dynamics of semiconductor zinc oxide (ZnO) are investigated using a modified time-resolved pump-probe system with phase object performed at 532 nm on picosecond timescale. The measurement method is based on method with a phase object for measurement of optical nonlinearities and standard time-resolved pump-probe system. The sample's nonlinear optical properties can be determined by measuring the normalized transmittance with/without an aperture in the far field. The experimental results show that the nonlinear response of ZnO is a combination of bound-electronic and free-carrier nonlinearities mechanism. With the theory of two-photon induced free-carrier nonlinearity, we fitted the experimental results and the nonlinear parameters of ZnO, such as two-photon absorption coefficient β, two-photon induced free-carrier absorption cross sectionσ and life time of the free-carrier τr are obtained.

Paper Details

Date Published: 23 August 2011
PDF: 7 pages
Proc. SPIE 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging, 81923N (23 August 2011); doi: 10.1117/12.900989
Show Author Affiliations
Lirong Ge, Soochow Univ. (China)
Min Shui, Harbin Institute of Technology (China)
Xiao Jin, Harbin Institute of Technology (China)
Zhongguo Li, Soochow Univ. (China)
Yinglin Song, Soochow Univ. (China)
Harbin Institute of Technology (China)


Published in SPIE Proceedings Vol. 8192:
International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging

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