Abstract
Localized heating in the focus of an optical trap operating in water can result in a temperature rise of several kelvins. We present spatially resolved measurements of the refractive-index distribution induced by the localized heating produced in an optical trap and infer the temperature distribution. We have determined a peak temperature rise in water of 4 K in the focus of a 985-nm-wavelength 55-mW laser beam. The localized heating is directly proportional to power and the absorption coefficient. The temperature distribution is in excellent agreement with a model based on the heat equation.
© 2000 Optical Society of America
Full Article | PDF ArticleMore Like This
Andreas Schönle and Stefan W. Hell
Opt. Lett. 23(5) 325-327 (1998)
Ana Andres-Arroyo, Fan Wang, Wen Jun Toe, and Peter Reece
Biomed. Opt. Express 6(9) 3646-3654 (2015)
Poonam Kumari, J. A. Dharmadhikari, A. K. Dharmadhikari, H. Basu, S. Sharma, and D. Mathur
Opt. Express 20(4) 4645-4652 (2012)