Vortex microlaser with ultrafast tunability

Zhifeng Zhang; Xingdu Qiao; Bikashkali Midya; Kevin Liu; Haoqi Zhao; Jingbo Sun; Tianwei Wu; Danilo Pires; Wenjing Liu; Zihe Gao; Ritesh Agarwal; Josep Jornet; Stefano Longhi; Natalia Litchinitser; Liang Feng

doi:10.1117/12.2602379

9 October 2021 Vortex microlaser with ultrafast tunability

Zhifeng Zhang, Xingdu Qiao, Bikashkali Midya, Kevin Liu, Haoqi Zhao, Jingbo Sun, Tianwei Wu, Danilo Pires, Wenjing Liu, Zihe Gao, Ritesh Agarwal, Josep Jornet, Stefano Longhi, Natalia Litchinitser, Liang Feng

Author Affiliations +

Proceedings Volume 11890, Advanced Lasers, High-Power Lasers, and Applications XII; 118900P (2021) https://doi.org/10.1117/12.2602379
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China

Abstract

The full vector nature of light provides an additional degree of freedom, namely, the angular momentum (AM) which includes both spin angular momentum (SAM) and orbital angular momentum (OAM). This full AM space holds a great promise for multi-dimensional high capacity data modulation and multiplexing in both classical and quantum regimes, confronting the exploding demands for information. The dynamical generation and control of optical vortices carrying SAM-OAM states mainly rely on tabletop optics. Vortex microlasers offer more compact and robust solution. However, the recently developed vortex microlasers either lack reconfigurability or require extremely low temperature operation environment, limiting the potential real world applications. By harnessing the properties of total angular momentum conservation, spin-orbit interaction and optically controlled non-Hermitian symmetry breaking, we demonstrate an on-chip integrated SAM-OAM-tunable vortex microlaser at room temperature, providing up to 5 different SAM-OAM states at a single telecom wavelength. Moreover, by utilizing fast transient optical gain dynamics in semiconductor materials, we experimentally demonstrate the ultrafast control of fractional OAM emission continuously from 0 to +2 in less than 100 ps. Our toolbox of flexible generation and control of vortex emission at a single wavelength provides a feasible route for the development of the next generation of multi-dimensional high capacity information system in both classical and quantum regimes.

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Zhifeng Zhang, Xingdu Qiao, Bikashkali Midya, Kevin Liu, Haoqi Zhao, Jingbo Sun, Tianwei Wu, Danilo Pires, Wenjing Liu, Zihe Gao, Ritesh Agarwal, Josep Jornet, Stefano Longhi, Natalia Litchinitser, and Liang Feng "Vortex microlaser with ultrafast tunability", Proc. SPIE 11890, Advanced Lasers, High-Power Lasers, and Applications XII, 118900P (9 October 2021); https://doi.org/10.1117/12.2602379

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KEYWORDS

Ultrafast phenomena

Amplitude modulation

Quantum information

Explosives

Integrated optics

Modulation

Multiplexing

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