Measurement of localized heating in the focus of an optical trap

被引：40
作者：
Celliers, PM
Conia, J
机构：
[1] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
[2] Cell Robot Inc, Albuquerque, NM 87107 USA
来源：
APPLIED OPTICS | 2000年 / 39卷 / 19期
关键词：
D O I：
10.1364/AO.39.003396
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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. (C) 2000 Optical Society of America OCIS codes: 170.4520, 120.3180.
引用
收藏
页码：3396 / 3407
页数：12
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