Study on effect of optical wavelength on photo induced strain sensitivity in carbon nanotubes using fiber Bragg grating

Shivananju, BN and Asokan, S and Misra, Abha (2015) Study on effect of optical wavelength on photo induced strain sensitivity in carbon nanotubes using fiber Bragg grating. In: JOURNAL OF PHYSICS D-APPLIED PHYSICS, 48 (27).

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Abstract

In this work, the role of optical wavelength on the photo induced strain in carbon nanotubes (CNT) is probed using a Fiber Bragg Grating (FBG), upon exposure to infrared (IR) (21 mu epsilon mW(-1)) and visible (9 mu epsilon mW(-1)) radiations. The strain sensitivity in CNT is monitored over a smaller range (10(-3) to 10(-9) epsilon) by exposing to a low optical power varying in the range 10(-3) to 10(-6) W. In addition, the wavelength dependent response and recovery periods of CNT under IR (tau(rise) = 150 ms, tau(fall) = 280 ms) and visible (tau(rise) = 1.07 s, tau(fall) = 1.18 s) radiations are evaluated in detail. This study can be further extended to measure the sensitivity of nano-scale photo induced strains in nano materials and opens avenues to control mechanical actuation using various optical wavelengths.

Item Type:	Journal Article
Publication:	JOURNAL OF PHYSICS D-APPLIED PHYSICS
Publisher:	IOP PUBLISHING LTD
Additional Information:	Copy right for this article belongs to the IOP PUBLISHING LTD, TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
Keywords:	carbon nanotubes; fiber Bragg grating; optical wavelength; photo induced strain
Department/Centre:	Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	31 Jul 2015 10:36
Last Modified:	22 Oct 2018 10:32
URI:	http://eprints.iisc.ac.in/id/eprint/51943

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