Measurement of the Thermalization via Heat Radiation of an Individual Object Thinner than the Thermal Wavelength

Author(s): C. Wuttke, A. Rauschenbeutel

Journal: Physical Review Letters

Volume: 111

Page(s): 024301

Year: 2013

DOI Number: 10.1103/PhysRevLett.111.024301

Link: Link to publication

Abstract:

Modeling and investigating the thermalization of microscopic objects with arbitrary shape from first principles is of fundamental interest and may lead to technical applications. Here, we study, over a large temperature range, the thermalization dynamics due to far-field heat radiation of an individual, deterministically produced silica fiber with a predetermined shape and a diameter smaller than the thermal wavelength. The temperature change of the subwavelength-diameter fiber is determined through a measurement of its optical path length in conjunction with an ab initio thermodynamic model of the fiber structure. Our results show excellent agreement with a theoretical model that considers heat radiation as a volumetric effect and takes the emitter shape and size relative to the emission wavelength into account.

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