KANAMOTO Rina    Department   Undergraduate School  , School of Science and Technology    Position   Professor
Research Period	2014/04～2017/03
Research Topic	Size effects in thermal radiation from a microparticle
Research Type	KAKENHI Research
Consignor	Japan Society for the Promotion of Science
Research Program Type	Grant-in-Aid for Scientific Research (C)
KAKENHI Grant No.	26400420
Responsibility	Research Contributor
Representative Person	Tachikawa Maki
Details	The thermal emission spectrum of a micron-sized particle critically depends on the size and shape of the emitter via the cavity QED effect. In the case of a sphere, spontaneous emission is enhanced at frequencies resonant with specific whispering gallery modes of the spherical resonator. The observed spectral profiles are reproduced by calculations based on the Mie scattering theory and a semi-classical rate-equation model, which leads to a precise determination of optical constants of extremely hot materials. The Mie theory predicts that thermal radiation becomes monochromatic at the surface phonon-polariton resonance as the emitting body shrinks to submicron regime. Search for the mid-infrared spectrum is in progress.