Local temperature pattern in plasmonic gold nanoshell: tuning the
heat generation |
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Authors: | J Zhu Z Sun J-J Li and J-W Zhao |
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Institution: | (1) Laser Dynamics Laboratory, School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332-0400, USA;(2) Department of Otolaryngology—Head and Neck Surgery, Comprehensive Cancer Center, University of California at San Francisco, San Francisco, CA 94143, USA;(3) University of California, Berkeley, CA 94720, USA; |
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Abstract: | Under quasi-steady-state conditions, we investigated the photo-heat
conversion in a gold nanoshell by calculating the local equilibrium
temperature distribution. In a thinner gold shell, the hot spots take place
near the poles of both shell-surrounding and core-shell interface,
perpendicularly to the incident field. In a thicker gold shell, the hot
spots only take place near the core-shell interface. The maximum local
temperature also depends greatly on the core media and shell thickness.
Optimal heat generation can be obtained with small core dielectric constant
and thin shell thickness. The mechanism of this local heating distribution
is explained by the local field enhancement that is induced by the plasmon
coupling. |
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Keywords: | |
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