Optical fiber tip for field-enhanced second harmonic generation

Pal, S.S. and Mondal, S.K. and Bajpai, P.P. and Kapur, Pawan (2012) Optical fiber tip for field-enhanced second harmonic generation. Optics Letters, 37 (19). pp. 4017-4019. ISSN 0146-9592 (print) 1539-4794 (online)

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Official URL: http://www.opticsinfobase.org/ol/abstract.cfm?uri=...

Abstract

We propose a simple optical fiber tip for field-enhanced second harmonic generation (SHG). The tip shows nonlinear phenomena of SHG over a wide range of sources, at least from 630 to 830 nm. The optical field corresponding to the second harmonic appears as a nondiffracting bottle beam with voids due to the surface curvature of the tip. The field-enhanced second harmonic can also induce surface plasmons, converting the tip to a plasmonic probe with reduced background signal. The tip can be useful in nanophotonics characterization. As an example, we demonstrate the tip’s response as a surface-enhanced Raman spectroscopy probe.

Item Type: Article
Subjects: CSIO > Optics
Divisions: Photonics Instrumentation
Depositing User: Ms. J Shrivastav
Date Deposited: 01 Feb 2013 03:56
Last Modified: 01 Feb 2013 03:56
URI: http://csioir.csio.res.in/id/eprint/335

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