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Related Experiment Video

Updated: Dec 25, 2025

Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation

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On-chip single-mode CdS nanowire laser.

Qingyang Bao¹, Weijia Li¹, Peizhen Xu¹

¹1State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, 310027 China.

Light, Science & Applications

|March 21, 2020

Summary

We developed a compact on-chip single-mode cadmium sulfide (CdS) nanowire laser integrated onto a silicon nitride (SiN) photonic chip. This hybrid nanolaser offers efficient light output and tunable coupling for integrated photonic applications.

Keywords:

Nanowires Silicon photonics

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Last Updated: Dec 25, 2025

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Area of Science:

Nanophotonics
Integrated Photonics
Semiconductor Lasers

Background:

Cadmium sulfide (CdS) nanowires offer unique optical properties for nanolasers.
Silicon nitride (SiN) photonic chips provide a robust platform for integrated optical devices.

Purpose of the Study:

To demonstrate a compact, on-chip single-mode CdS nanowire laser.
To integrate nanowire lasers with photonic circuits for advanced applications.

Main Methods:

Fabrication of a free-standing CdS nanowire laser on a SiN photonic chip.
Utilizing a Mach-Zehnder interferometer (MZI) for mode selection.
Evanescent coupling to transfer laser output to a SiN waveguide.

Main Results:

Achieved on-chip single-mode lasing at ~518.9 nm with a 0.1 nm linewidth.
Lasing threshold of 4.9 kW/cm² and side-mode suppression ratio of 13 dB.
High coupling efficiency (up to 58%) into SiN waveguide with tunable directional coupling.

Conclusions:

The integrated CdS nanowire laser represents a significant advancement in on-chip light sources.
This hybrid nanolaser technology opens avenues for novel nanowire photonic devices.
Potential for a new class of hybrid nanolasers for chip-integrated applications.