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Proceedings Paper

High purity twisted light from a metasurface solid state resonator
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Paper Abstract

Twisted light carrying orbital angular momentum (OAM) has given rise to many developments ranging from optical manipulation to optical communications. Generating twisted light from solid-state lasers was initially achieved by amplitude and dynamic phase control, and more recently by manipulating the geometric phase of light. These lasers have been limited to generate superposition of OAM modes as well as scalar modes with OAM ℓ = 10. Here we incorporate a metasurface device into a visible solid-state laser to control the angular momentum of light by arbitrary spin-to-orbit coupling. We demonstrate the generation of pure Laguerre Gaussian modes with OAM up to ℓ = 100. Modal decomposition measurements of the output beams reveal the higher purity of the generated modes can reach up to 96% for ℓ = 1 and 88% for ℓ = 100. our approach offers a new route for high brightness OAM states at the source.

Paper Details

Date Published: 13 March 2020
PDF: 6 pages
Proc. SPIE 11259, Solid State Lasers XXIX: Technology and Devices, 112590H (13 March 2020); doi: 10.1117/12.2546189
Show Author Affiliations
Hend Sroor, Univ. of Shanghai for Science and Technology (China)
Univ. of the Witwatersrand, Johannesburg (South Africa)
Yao-Wei Huang, Harvard Univ. (United States)
National Univ. of Singapore (Singapore)
Bereneice Sephton, Univ. of the Witwatersrand, Johannesburg (South Africa)
Darryl Naidoo, Univ. of the Witwatersrand, Johannesburg (South Africa)
CSIR National Laser Ctr. (South Africa)
Adam Vallés, Univ. of the Witwatersrand, Johannesburg (South Africa)
Chiba Univ. (Japan)
Vincent Ginis, Harvard Univ. (United States)
Qiwen Zhan, Univ. of Shanghai for Science and Technology (China)
Univ. of Dayton (United States)
Cheng-Wei Qiu, National Univ. of Singapore (Singapore)
Antonio Ambrosio, Harvard Univ. (United States)
Fondazione Istituto Italiano di Tecnologia (Italy)
Federico Capasso, Harvard Univ. (United States)
Andrew Forbes, Univ. of the Witwatersrand, Johannesburg (South Africa)


Published in SPIE Proceedings Vol. 11259:
Solid State Lasers XXIX: Technology and Devices
W. Andrew Clarkson; Ramesh K. Shori, Editor(s)

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