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5 May 2016 Sensitive in situ nanothermometer using femtosecond optical tweezers
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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.
© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE) 1934-2608/2016/$25.00 © 2016 SPIE
Dipankar Mondal and Debabrata Goswami "Sensitive in situ nanothermometer using femtosecond optical tweezers," Journal of Nanophotonics 10(2), 026013 (5 May 2016). https://doi.org/10.1117/1.JNP.10.026013
Published: 5 May 2016
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