Fig. 1. The three core problems of CQD laser research and the corresponding solutions for achieving high-temperature CQD lasers. (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Fig. 1. The three core problems of CQD laser research and the corresponding solutions for achieving high-temperature CQD lasers.

Caption

Dispersed CQD self-assembling into close-packed CQD cluster to achieve high packing density, then to the CQD-assembly microsphere to achieve high coupling efficiency, finally to the solidified microsphere to achieve stable and integrated high-T laser. The CQD-assembly microsphere can serve as both gain medium and microcavity. Lights travel inside the WGM microcavity due to the total internal reflection at the resonator boundary to achieve high coupling efficiency. CQDAMs are solidified in silica matrix through sol-gel method to ensure stable working at high temperature.

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by Hongxing Dong, Wei Xie, Long Zhang

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