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, Guichuan Xing

Research output: Journal article publicationJournal articleAcademic researchpeer-review

48 Citations (Scopus)


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.

Original languageEnglish
Article number3361
JournalNature Communications
Issue number1
Publication statusPublished - 17 Jul 2020

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)


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