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Proceedings Paper

OAM beam propagation in hollow core capillary fiber for the study of chiral light matter interactions
Author(s): Satyendra K. Mishra; Manish Sharma; Bora Ung
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Paper Abstract

Beams carrying orbital angular momentum (OAM) are attractive as they offer a theoretically unbounded number of discrete states and have therefore been a subject of great interest for a variety of fundamental and applied research including optical communications, optical trapping, super-resolution microscopy, remote sensing and quantum information. In this work, we present a study on the use of fused silica capillary optical fibers for OAM beam propagation by means of antiresonant reflecting waveguiding. In particular, we propose the application of these simple and commercially available fibers for probing the light–matter interactions within the hollow core. We show that OAM beams (topological charge |L| = 1) of high mode purity (>90%) can be achieved in such capillary fibers. The stability of the OAM beam propagation was theoretically and experimentally demonstrated in the visible range. A numerical study based on full-vector finite-element method is conducted to characterize the change of OAM mode purity and loss as a function of the refractive index (RI) of the material filling the core. The propagation loss remains in the range of a few dB/m throughout the range of RI values varying from 1 to 1.39 that encompasses many analytes in the vapor or liquid phase. Finally, we propose that the simple capillary fiber can be used as a cost-effective optofluidic platform to study OAM light-matter interactions and new optical phenomena involving biochemical analytes.

Paper Details

Date Published: 9 September 2019
PDF: 7 pages
Proc. SPIE 11083, Optical Trapping and Optical Micromanipulation XVI, 1108330 (9 September 2019); doi: 10.1117/12.2528855
Show Author Affiliations
Satyendra K. Mishra, École de Technologie Supérieure (Canada)
Manish Sharma, École de Technologie Supérieure (Canada)
Bora Ung, École de Technologie Supérieure (Canada)

Published in SPIE Proceedings Vol. 11083:
Optical Trapping and Optical Micromanipulation XVI
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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