Demonstration of on-chip quantum dot microcavity lasers in a molecularly engineered annular groove

Cong Chen, Jin Yuan, Lei Wan, Hengky Chandrahalim, Zhenshi Chen, Naoya Nishimura, Harunobu Takeda, Hiroaki Yoshioka, Weiping Liu, Yuji Oki, Xudong Fan, Zhaohui Li

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


The on-chip quantum dot (QD) microcavity laser engineered on an annular groove made of fused silica was demonstrated based on the external quasi-cavity configuration. By incorporating an appropriate dose of polymer into QD film, the spectral purity of the lasing spectrum was significantly enhanced. In contrast to the dye microcavity laser embedded on the same trench profile, a QD laser possesses a lifetime that is over 10 times longer. We have introduced a unique two-step quantum gain deposition process that has remarkably reduced the wavelength drifts of laser emissions in an aqueous environment by approximately 400%. The reconfigurable cavity platform in combination with an appropriately engineered quantum gain medium embedded onto it promises to enable photostable chip-scale coherent light sources for various photonic, chemical, and biochemical sensing applications.

Original languageEnglish
Pages (from-to)495-498
Number of pages4
JournalOptics Letters
Issue number3
Publication statusPublished - Feb 1 2019

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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