Share Email Print
cover

Proceedings Paper

Generation of arbitrary higher order Poincaré beams from a visible metasurface laser
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

The use of beams carrying orbital angular momentum (OAM) has become ubiquitous and topical in a variety of research fields. More recently, there has been a growing interest in exotic OAM carrying beams with spatially variant polarisation, so called Poincaré sphere beams. Structuring these beams at the source gives rise to compact solutions for a myriad of applications, from laser materials processing to microscopy. Here we present a visible laser that control's the angular momentum of light by arbitrary spin-orbit (SO) momentum conversion using novel metasurface devices. Further, we outline how to generate high purity OAM states in a deterministic manner with charge up to 100. Finally, we demonstrate the generation of symmetric and non-symmetric vector vortex beams from the same source with a large OAM differential between modes of up to 90. The performance and versatility in design of our approach offers a route to control light's angular momentum at the source.

Paper Details

Date Published: 13 March 2020
PDF: 7 pages
Proc. SPIE 11266, Laser Resonators, Microresonators, and Beam Control XXII, 112660L (13 March 2020); doi: 10.1117/12.2546267
Show Author Affiliations
Hend Sroor, Univ. of Shanghai for Science and Technology (China)
Univ. of the Witwatersrand (South Africa)
Yao-Wei Huang, Harvard Univ. (United States)
National Univ. of Singapore (Singapore)
Bereneice Sephton, Univ. of the Witwatersrand (South Africa)
Darryl Naidoo, Univ. of the Witwatersrand (South Africa)
CSIR National Laser Ctr. (South Africa)
Adam Valles, Univ. of the Witwatersrand (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)
CNST (Italy)
Federico Capasso, Harvard Univ. (United States)
Andrew Forbes, Univ. of the Witwatersrand (South Africa)


Published in SPIE Proceedings Vol. 11266:
Laser Resonators, Microresonators, and Beam Control XXII
Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko; Andrea M. Armani, Editor(s)

© SPIE. Terms of Use
Back to Top
PREMIUM CONTENT
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?
close_icon_gray