Optical fiber antenna generating spiral beam shapes

Pal, S.S. and Mondal, S.K. and Kumbhakar, D. and Kumar, R and Akula, Aparna and Ghosh, Ripul and Bhatnagar, Randhir (2014) Optical fiber antenna generating spiral beam shapes. Applied Physics Letters, 104 (3). 031105. ISSN Print : 0003-6951, Online : 1077-3118

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Official URL: http://scitation.aip.org/content/aip/journal/apl/1...

Abstract

A simple method is proposed here to generate vortex beam and spiral intensity patterns from a Gaussian source. It uses a special type of optical fiber antenna of aperture ∼80 nm having naturally grown surface curvature along its length. The antenna converts linearly polarized Gaussian beam into a beam with spiral intensity patterns. The experimentally obtained spiral patterns with single and double spiral arms manifest the orbital angular momentum, l = ±1, 2, carried by the output beam. Such beam can be very useful for optical tweezer, metal machining, and similar applications.

Item Type: Article
Subjects: CSIO > Photonics Instrumentation
Divisions: Photonics Instrumentation
Depositing User: Ms. Jyotsana
Date Deposited: 13 Jan 2015 10:27
Last Modified: 13 Jan 2015 10:27
URI: http://csioir.csio.res.in/id/eprint/439

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