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9 September 2019 OAM beam propagation in hollow core capillary fiber for the study of chiral light matter interactions
Satyendra K. Mishra, Manish Sharma, Bora Ung
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Proceedings Volume 11083, Optical Trapping and Optical Micromanipulation XVI; 1108330 (2019) https://doi.org/10.1117/12.2528855
Event: SPIE Nanoscience + Engineering, 2019, San Diego, California, United States
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.
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Satyendra K. Mishra, Manish Sharma, and Bora Ung "OAM beam propagation in hollow core capillary fiber for the study of chiral light matter interactions", Proc. SPIE 11083, Optical Trapping and Optical Micromanipulation XVI, 1108330 (9 September 2019); https://doi.org/10.1117/12.2528855
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KEYWORDS
Capillaries
Refractive index
Light-matter interactions
Optical fibers
Wave propagation
Silica
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