Integrated compact optical vortex beam emitters.

  title={Integrated compact optical vortex beam emitters.},
  author={Xinlun Cai and Jianwei Wang and Michael J. Strain and Benjamin Johnson-Morris and Jiangbo Zhu and Marc Sorel and Jeremy Lloyd O'Brien and Mark G. Thompson and Siyuan Yu},
  volume={338 6105},
Emerging applications based on optical beams carrying orbital angular momentum (OAM) will probably require photonic integrated devices and circuits for miniaturization, improved performance, and enhanced functionality. We demonstrate silicon-integrated optical vortex emitters, using angular gratings to extract light confined in whispering gallery modes with high OAM into free-space beams with well-controlled amounts of OAM. The smallest device has a radius of 3.9 micrometers. Experimental… CONTINUE READING
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