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Method for tuning light extinction by thermal expansion of coated nanoparticles |
JOSA B, Vol. 29, Issue 9, pp. 2542-2547 (2012)
http://dx.doi.org/10.1364/JOSAB.29.002542
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Abstract
We propose a novel method for all-optical modulation. Our method is based on tuning the dimensions of nanoparticles by manipulating thermal energy. The excitation characteristics of coated nanoparticles change following minor variations in their dimensions. This is because incident radiation will encounter particles with an altered extinction cross section. We considered nanoparticles comprising gold cores with silica coating. We found distinct nanoparticle dimensions that exhibit steep changes in their optical extinction cross section under thermal expansion. Based on these dimensions we calculated the optical contrast. The results showed that optical contrast reaches 1.86 dB for radii of 900 nm.
© 2012 Optical Society of America
OCIS Codes
(000.6850) General : Thermodynamics
(060.4080) Fiber optics and optical communications : Modulation
(140.6810) Lasers and laser optics : Thermal effects
(290.4020) Scattering : Mie theory
(160.4236) Materials : Nanomaterials
ToC Category:
Optical Devices
History
Original Manuscript: June 5, 2012
Revised Manuscript: July 18, 2012
Manuscript Accepted: July 26, 2012
Published: August 29, 2012
Virtual Issues
Vol. 7, Iss. 11 Virtual Journal for Biomedical Optics
Citation
Etai Rosenkrantz and Shlomi Arnon, "Method for tuning light extinction by thermal expansion of coated nanoparticles," J. Opt. Soc. Am. B 29, 2542-2547 (2012)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=josab-29-9-2542
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