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High Circular Polarized Nanolaser with Chiral Gammadion Metal Cavity.

ABSTRACT: We demonstrate a circularly polarized laser with the metal-gallium-nitride gammadion nanocavities. The ultraviolet lasing signal was observed with the high circular dichroism at room temperature under pulsed optical pump conditions. Without external magnetism which breaks the time-reversal symmetry to favor optical transitions of a chosen handedness, the coherent outputs of these chiral nanolasers show a dissymmetry factor as high as 1.1. The small footprint of these lasers are advantageous for applications related to circularly polarized photons in future integrated systems, in contrast to the bulky setup of linearly-polarized lasers and quarter-wave plates.

SUBMITTER: Yu CL

PROVIDER: S-EPMC7217972 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature

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High Circular Polarized Nanolaser with Chiral Gammadion Metal Cavity.

Yu Cheng-Li CL Hsiao Yu-Hao YH Chang Chiao-Yun CY Cheng Pi-Ju PJ Lin Hsiang-Ting HT Lai Ming-Sheng MS Kuo Hao-Chung HC Chang Shu-Wei SW Shih Min-Hsiung MH

Scientific reports 20200512 1

We demonstrate a circularly polarized laser with the metal-gallium-nitride gammadion nanocavities. The ultraviolet lasing signal was observed with the high circular dichroism at room temperature under pulsed optical pump conditions. Without external magnetism which breaks the time-reversal symmetry to favor optical transitions of a chosen handedness, the coherent outputs of these chiral nanolasers show a dissymmetry factor as high as 1.1. The small footprint of these lasers are advantageous for ...[more]

PMID: 32398835

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