Abstract

The broadband nonlinear absorption in ZnO nanocrystals embedded in Al2O3 matrix was investigated by Z-scan and pump–probe techniques from 400 nm to 800 nm. The effective two-photon absorption and three-photon absorption coefficients were determined to be 1.1×103  cm/GW at 400 nm and 1.1×101  cm3/GW2 at 800 nm, respectively, which are at least two orders of magnitude greater than that in ZnO bulk crystal. It may be attributed to the defect-states-mediated multiphoton absorption process, which was proofed by comparison experiments with different densities of interfacial defect states. The corresponding lifetimes for the intraband relaxation, defect-states trapping, and interband recombination processes were measured by femtosecond transient absorption measurements as τ11  ps, τ213  ps, and τ3350  ps, respectively.

© 2018 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Enhanced fluorescence of a porous Al2O3 film using gold nanoparticles on self-assembled CdSe/Au/Al2O3 heterojunctions

Zhongchen Bai, Jing Zhou, Man Peng, Zhengping Zhang, and Shuijie Qin
J. Opt. Soc. Am. B 36(6) 1420-1428 (2019)

Electroluminescence of ZnO nanocrystal in sputtered ZnO-SiO2 nanocomposite light-emitting devices

Jiun-Ting Chen, Wei-Chih Lai, Chi-Heng Chen, Ya-Yu Yang, Jinn-Kong Sheu, and Li-Wen Lai
Opt. Express 19(12) 11873-11879 (2011)

Luminescence enhancement of ZnO-core/a-SiNx:H-shell nanorod arrays

Rui Huang, Shuigang Xu, Yanqing Guo, Wenhao Guo, Xiang Wang, Chao Song, Jie Song, Lin Wang, Kin Ming Ho, and Ning Wang
Opt. Express 21(5) 5891-5896 (2013)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription