On-chip single-mode CdS nanowire laser

Qingyang Bao; Weijia Li; Peizhen Xu; Ming Zhang; Daoxin Dai; Pan Wang; Xin Guo; Limin Tong

doi:10.1038/s41377-020-0277-0

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On-chip single-mode CdS nanowire laser

Letter

- On-chip single-mode CdS nanowire laser
- Light: Science & Applications Vol. 9, Issue 2, Pages: 231-235(2020)
- Affiliations：
  
  1.State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
  2.Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
- Author bio：
  
  Xin Guo (guoxin@zju.edu.cn)
  Limin Tong (phytong@zju.edu.cn)
- Funds：
- DOI：10.1038/s41377-020-0277-0
  CLC：
- Published：2020，
  
  Published Online：16 March 2020，
  
  Received：31 October 2019，
  
  Revised：22 February 2020，
  
  Accepted：26 February 2020
- Accepted：
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Bao, Q. Y. et al. On-chip single-mode CdS nanowire laser. Light: Science & Applications, 9, 231-235 (2020).
DOI：

Bao, Q. Y. et al. On-chip single-mode CdS nanowire laser. Light: Science & Applications, 9, 231-235 (2020). DOI： 10.1038/s41377-020-0277-0.

摘要

Abstract

By integrating a free-standing cadmium sulfide (CdS) nanowire onto a silicon nitride (SiN) photonic chip

we demonstrate a highly compact on-chip single-mode CdS nanowire laser. The mode selection is realized using a Mach-Zehnder interferometer (MZI) structure. When the pumping intensity exceeds the lasing threshold of 4.9 kW/cm

on-chip single-mode lasing at ~518.9 nm is achieved with a linewidth of 0.1 nm and a side-mode suppression ratio of up to a factor of 20 (13 dB). The output of the nanowire laser is channel

led into an on-chip SiN waveguide with high efficiency (up to 58%) by evanescent coupling

and the directional coupling ratio between the two output ports can be varied from 90 to 10% by predesigning the coupling length of the SiN waveguide. Our results open new opportunities for both nanowire photonic devices and on-chip light sources and may pave the way towards a new category of hybrid nanolasers for chip-integrated applications.

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references

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