Ultrashort laser pulse doubling by metal-halide perovskite multiple quantum wells

Jia Guo, Tanghao Liu, Mingjie Li (), Chao Liang, Kaiyang Wang, Guo Hong, Yuxin Tang, Guankui Long, Siu-Fung Yu, Tae-Woo Lee, Wei Huang and Guichuan Xing ()
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Jia Guo: University of Macau
Tanghao Liu: University of Macau
Mingjie Li: The Hong Kong Polytechnic University
Chao Liang: University of Macau
Kaiyang Wang: University of Macau
Guo Hong: University of Macau
Yuxin Tang: University of Macau
Guankui Long: Nankai University
Siu-Fung Yu: The Hong Kong Polytechnic University
Tae-Woo Lee: Seoul National University (SNU)
Wei Huang: Northwestern Polytechnical University (NPU)
Guichuan Xing: University of Macau

Nature Communications, 2020, vol. 11, issue 1, 1-8

Abstract: Abstract Multiple ultrashort laser pulses are widely used in optical spectroscopy, optoelectronic manipulation, optical imaging and optical signal processing etc. The laser pulse multiplication, so far, is solely realized by using the optical setups or devices to modify the output laser pulse from the optical gain medium. The employment of these external techniques is because the gain medium itself is incapable of modifying or multiplying the generated laser pulse. Herein, with single femtosecond laser pulse excitation, we achieve the double-pulsed stimulated emission with pulse duration of around 40 ps and pulse interval of around 70 ps from metal-halide perovskite multiple quantum wells. These unique stimulated emissions originate from one fast vertical and the other slow lateral high-efficiency carrier funneling from low-dimensional to high-dimensional quantum wells. Furthermore, such gain medium surprisingly possesses nearly Auger-free stimulated emission. These insights enable us a fresh approach to multiple the ultrashort laser pulse by gain medium.

Date: 2020
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DOI: 10.1038/s41467-020-17096-6

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