Directional lasing in resonant semiconductor nanoantenna arrays

Ha, Son Tung and Fu, Yuan Hsing and Emani, Naresh Kumar and Pan, Zhenying and Bakker, Reuben M and Paniagua-Domínguez, Ramón and Kuznetsov, Arseniy I (2018) Directional lasing in resonant semiconductor nanoantenna arrays. Nature Nanotechnology. ISSN 1748-3387 (In Press)

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High-index dielectric and semiconductor nanoparticles supporting strong electric and magnetic resonances have drawn significant attention in recent years. However, until now, there have been no experimental reports of lasing action from such nanostructures. Here, we demonstrate directional lasing, with a low threshold and high quality factor, in active dielectric nanoantenna arrays achieved through a leaky resonance excited in coupled gallium arsenide (GaAs) nanopillars. The leaky resonance is formed by partially breaking a bound state in the continuum generated by the collective, vertical electric dipole resonances excited in the nanopillars for subdiffractive arrays. We control the directionality of the emitted light while maintaining a high quality factor (Q = 2,750). The lasing directivity and wavelength can be tuned via the nanoantenna array geometry and by modifying the gain spectrum of GaAs with temperature. The obtained results provide guidelines for achieving surface-emitting laser devices based on active dielectric nanoantennas that are compact and highly transparent.

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IITH Creators:
IITH CreatorsORCiD
Emani, Naresh Kumar
Item Type: Article
Subjects: Electrical Engineering
Divisions: Department of Electrical Engineering
Depositing User: Team Library
Date Deposited: 18 Sep 2018 10:12
Last Modified: 18 Sep 2018 10:12
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