Lasing in Valley-Hall Topological Nanocavities (IMAGE)

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

Lasing in Valley-Hall Topological Nanocavities

Caption

a Scanning electron microscope image of the fabricated sample. The false-colour triangle marks the interior of the topological cavity. b Emission energy vs. the pump energy dependence showing a threshold transition to lasing. The sample is optically pumped at a 980 nm wavelength with 8 ns pulses at a 10 kHz repetition rate. c, d Spatial distribution of emission for the pump intensity (c) below and (d) above the lasing threshold.

Credit

by Daria Smirnova, Aditya Tripathi, Sergey Kruk, Min-Soo Hwang, Ha-Reem Kim, Hong-Gyu Park, and Yuri Kivshar

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