DOI QR코드

DOI QR Code

Directional Orbital Angular Momentum Generator with Enhanced Vertical Emission Efficiency

Tran, Thang Q.;Kim, Sangin

  • Received : 2019.03.28
  • Accepted : 2019.06.11
  • Published : 2019.08.25

Abstract

We propose a ring resonator-based orbital angular momentum carrying vortex beam generator design with high vertical directional emission efficiency. By adopting a vertically asymmetric grating structure in the ring resonator, optimized for enhanced vertical emission, an emission efficiency in one direction reaches as high as 78%, exceeding the 50% theoretical limit of previously designed vertically symmetric grating-assisted ring resonator-based structures.

Keywords

Optical orbital angular momentum;Vortex beam;Numerical modeling

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Acknowledgement

Supported by : Agency for Defense Development (ADD)