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Journal of Nanophotonics

Sensitive in situ nanothermometer using femtosecond optical tweezers
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Paper Abstract

We report the rise in temperature in various liquid media adjacent to a trapped bead. A nonheating laser at 780 nm has been used to optically trap a 500-nm radius polystyrene bead, while a simultaneous irradiation with a copropagating 1560-nm high-repetition-rate femtosecond laser led to temperature rise in various trapping media. Vibrational combination band of the hydroxyl group in the trapping media resulted in high absorption of 1560-nm laser. This, in turn, gave us control over the trapping media temperature at the focus of the optical trap.

Paper Details

Date Published: 5 May 2016
PDF: 8 pages
J. Nanophoton. 10(2) 026013 doi: 10.1117/1.JNP.10.026013
Published in: Journal of Nanophotonics Volume 10, Issue 2
Show Author Affiliations
Dipankar Mondal, Indian Institute of Technology Kanpur (India)
Debabrata Goswami, Indian Institute of Technology Kanpur (India)

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