Ultrafast carrier dynamics of Cu2O thin film induced by two-photon excitation

doi:10.1088/1674-1056/ac003c

中国物理B ›› 2021, Vol. 30 ›› Issue (11): 114205-114205.doi: 10.1088/1674-1056/ac003c

Ultrafast carrier dynamics of Cu₂O thin film induced by two-photon excitation

Jian Liu(刘建), Jing Li(李敬), Kai-Jun Mu(牧凯军), Xin-Wei Shi(史新伟), Jun-Qiao Wang(王俊俏), Miao Mao(毛淼), Shu Chen(陈述)^†, and Er-Jun Liang(梁二军)

School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China

收稿日期:2021-03-11 修回日期:2021-04-19 接受日期:2021-05-12 出版日期:2021-10-13 发布日期:2021-11-06
通讯作者: Shu Chen E-mail:chenshu@zzu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 61505178).

Ultrafast carrier dynamics of Cu₂O thin film induced by two-photon excitation

Jian Liu(刘建), Jing Li(李敬), Kai-Jun Mu(牧凯军), Xin-Wei Shi(史新伟), Jun-Qiao Wang(王俊俏), Miao Mao(毛淼), Shu Chen(陈述)^†, and Er-Jun Liang(梁二军)

School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450001, China

Received:2021-03-11 Revised:2021-04-19 Accepted:2021-05-12 Online:2021-10-13 Published:2021-11-06
Contact: Shu Chen E-mail:chenshu@zzu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 61505178).

摘要/Abstract

摘要： Cuprous oxide (Cu₂O) has attracted plenty of attention for potential nonlinear photonic applications due to its superior third-order nonlinear optical property such as two-photon absorption. In this paper, we investigated the two-photon excitation induced carrier dynamics of a Cu₂O thin film prepared by radio-frequency magnetron sputtering, using the femtosecond transient absorption experiments. Biexponential dynamics including an ultrafast carrier scattering (< 1 ps) followed by a carrier recombination (> 50 ps) were observed. The time constant of carrier scattering under two-photon excitation is larger than that under one-photon excitation, due to the different transition selection rules and smaller absorption coefficient of the two-photon excitation.

关键词: carrier dynamics, cuprous oxide, transient absorption, two-photon absorption

Abstract: Cuprous oxide (Cu₂O) has attracted plenty of attention for potential nonlinear photonic applications due to its superior third-order nonlinear optical property such as two-photon absorption. In this paper, we investigated the two-photon excitation induced carrier dynamics of a Cu₂O thin film prepared by radio-frequency magnetron sputtering, using the femtosecond transient absorption experiments. Biexponential dynamics including an ultrafast carrier scattering (< 1 ps) followed by a carrier recombination (> 50 ps) were observed. The time constant of carrier scattering under two-photon excitation is larger than that under one-photon excitation, due to the different transition selection rules and smaller absorption coefficient of the two-photon excitation.

Key words: carrier dynamics, cuprous oxide, transient absorption, two-photon absorption

中图分类号: (Nonlinear optics)

42.65.-k

42.70.Nq (Other nonlinear optical materials; photorefractive and semiconductor materials) 78.47.D- (Time resolved spectroscopy (>1 psec))

Jian Liu(刘建), Jing Li(李敬), Kai-Jun Mu(牧凯军), Xin-Wei Shi(史新伟), Jun-Qiao Wang(王俊俏), Miao Mao(毛淼), Shu Chen(陈述), and Er-Jun Liang(梁二军). Ultrafast carrier dynamics of Cu₂O thin film induced by two-photon excitation[J]. 中国物理B, 2021, 30(11): 114205-114205.

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Ultrafast carrier dynamics of Cu₂O thin film induced by two-photon excitation

Ultrafast carrier dynamics of Cu₂O thin film induced by two-photon excitation

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