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Title: Tunable optical vortex from a nanogroove-structured optofluidic microlaser
Authors: Qiao, Zhen
Gong, Chaoyang
Liao, Yikai
Wang, Chenlu
Chan, Kok Ken
Zhu, Song
Kim, Munho
Chen, Yu-Cheng
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2022
Source: Qiao, Z., Gong, C., Liao, Y., Wang, C., Chan, K. K., Zhu, S., Kim, M. & Chen, Y. (2022). Tunable optical vortex from a nanogroove-structured optofluidic microlaser. Nano Letters, 22(3), 1425-1432.
Project: A20E5c0085
Journal: Nano Letters 
Abstract: Optical vortices with tunable properties in multiple dimensions are highly desirable in modern photonics, particularly for broadly tunable wavelengths and topological charges at the micrometer scale. Compared to solid-state approaches, here we demonstrate tunable optical vortices through the fusion of optofluidics and vortex beams in which the handedness, topological charges, and lasing wavelengths could be fully adjusted and dynamically controlled. Nanogroove structures inscribed in Fabry-Pérot optofluidic microcavities were proposed to generate optical vortices by converting Hermite-Gaussian laser modes. Topological charges could be controlled by tuning the lengths of the nanogroove structures. Vortex laser beams spanning a wide spectral band (430-630 nm) were achieved by alternating different liquid gain materials. Finally, dynamic switching of vortex laser wavelengths in real-time was realized through an optofluidic vortex microlaser device. The findings provide a robust yet flexible approach for generating on-chip vortex sources with multiple dimensions, high tunability, and reconfigurability.
ISSN: 1530-6984
DOI: 10.1021/acs.nanolett.1c04065
Rights: © 2021 American Chemical Society. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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