Angular lens

2017/11/30 by Rishabh Sahu, Swati Chaudhary, Kedar Khare +5
Engineering · Materials Science · Physics and Astronomy · #Angular momentum #Angular momentum coupling #Angular momentum of light #Angular spectrum method #Beam (structure) #Classical mechanics #Diffraction #Lens (geology) #Light beam #Metamaterials and Metasurfaces Applications #Near-Field Optical Microscopy #Optical vortex #Optics #Orbital Angular Momentum in Optics #Orbital angular momentum multiplexing #Orbital angular momentum of light #Physics #Total angular momentum quantum number #Transverse plane #physics.optics

paper · pdf · doi:10.1364/oe.26.008709

published as Optics Express 26, No. 7 (2018): 8709-8718 · 5 pages, 5 figures

openalex publication_date 2018/03/26 · arxiv created 2018/06/30 · arxiv updated 2018/07/03 · openalex created_date 2018/07/10 · openalex updated_date 2026/08/05

Abstract

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.

Citations

• Entanglement of the orbital angular momentum states of photons
• Supersensitive measurement of angular displacements using entangled photons
• Security of Quantum Key Distribution Usingd-Level Systems
• Orbital angular momentum of light and the transformation of Laguerre-Gaussian laser modes
• Violations of Local Realism by Two EntangledN-Dimensional Systems Are Stronger than for Two Qubits

Cited by

• Radial Schmidt mode detector of entangled photons