Room-Temperature Broad-Wavelength-Tunable Single-Mode Lasing from Alloyed CdS1-xSeNanotripods

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Pengfei Guo
  • Qian Yang
  • Xia Shen
  • Qihang Lv
  • Yuying Hao
  • Liantuan Xiao

Detail(s)

Original languageEnglish
Pages (from-to)12767–12776
Journal / PublicationACS Nano
Volume16
Issue number8
Online published2 Aug 2022
Publication statusPublished - 23 Aug 2022

Abstract

Wavelength-tunable semiconductor nanolasers have attracted tremendous attention for their tunable emissions and robust stability, bringing possibilities for various applications, including nanophotonic circuits, solid-state white-light sources, wavelength-converted devices, and on-chip optical communications. Here, we report on the demonstration of broadband-tunable, single-mode nanolasers based on high-quality alloyed single crystalline CdS1-xSex (x = 0-1) nanotripods with well-formed facets fabricated using a conventional CVD approach. Microstructural characterization and optical investigations reveal that these structures are crystalline with composition-tunable CdS1-xSealloys. Microphotoluminescence spectra and mapping of these nanotripods exhibit emissions with continuous wavelengths from 509 to 712 nm, further demonstrating that the CdS1-xSealloys have tunable bandgaps due to the composition gradient. Additionally, under a pulse laser illumination, room-temperature single-mode lasing is clearly observed from these nanotripods cavities, which shows almost identical emission lines with a high-quality factor of 1231. More importantly, wavelength continuously tunable nanolasers from 520 to 738 nm are successfully constructed using these bandgap gradient nanotripods. The capability to fabricate high-quality tunable nanolasers represents a significant step toward high-integration optical circuits and photonics communications.

Research Area(s)

  • bandgap modulation, nanophotonics, nanotripods, semiconductor, wavelength-tunable nanolasers

Citation Format(s)

Room-Temperature Broad-Wavelength-Tunable Single-Mode Lasing from Alloyed CdS1-xSeNanotripods. / Guo, Pengfei; Yang, Qian; Shen, Xia; Lv, Qihang; Hao, Yuying; Xiao, Liantuan; Ho, Johnny C.; Yu, Kin Man.

In: ACS Nano, Vol. 16, No. 8, 23.08.2022, p. 12767–12776.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review