Investigation on nonlinear dynamics of ZnO using time-resolved pump-probe technique with phase object

Lirong Ge; Min Shui; Xiao Jin; Zhongguo Li; Yinglin Song

doi:10.1117/12.900989

22 August 2011 Investigation on nonlinear dynamics of ZnO using time-resolved pump-probe technique with phase object

Lirong Ge, Min Shui, Xiao Jin, Zhongguo Li, Yinglin Song

Proceedings Volume 8192, International Symposium on Photoelectronic Detection and Imaging 2011: Laser Sensing and Imaging; and Biological and Medical Applications of Photonics Sensing and Imaging; 81923N (2011) https://doi.org/10.1117/12.900989
Event: International Symposium on Photoelectronic Detection and Imaging 2011, 2011, Beijing, China

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 τ_r are obtained.

Citation Download Citation

Lirong Ge, Min Shui, Xiao Jin, Zhongguo Li, and Yinglin Song "Investigation on nonlinear dynamics of ZnO using time-resolved pump-probe technique with phase object", 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 (22 August 2011); https://doi.org/10.1117/12.900989

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KEYWORDS

Zinc oxide

Absorption

Refraction

Laser beam diagnostics

Transmittance

Nonlinear optics

Semiconductors

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