We propose a single phase-only optical element that transforms different orbital angular momentum (OAM) modes into localized spots at separated angular positions on a transverse plane. We refer to this element as an angular lens since it separates out OAM modes in a manner analogous to how a converging lens separates out transverse wave-vector modes at the focal plane. We also simulate the proposed angular lens using a spatial light modulator and experimentally demonstrate its working. Our work can have important implications for OAM-based classical and quantum communication applications.
Department, Program, or Center
School of Physics and Astronomy (COS)
Rishabh Sahu, Swati Chaudhary, Kedar Khare, Mishkatul Bhattacharya, Harshawardhan Wanare, and Anand K. Jha, "Angular lens," Opt. Express 26, 8709-8718 (2018)
RIT – Main Campus