2016 Fiscal Year Final Research Report
Size effects in thermal radiation from a microparticle
| Project/Area Number |
26400420
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Atomic/Molecular/Quantum electronics
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| Research Institution | Meiji University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | 熱放射 / 微粒子 / 光トラップ / 共振器QED |
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| Outline of Final Research Achievements |
Our original method of laser trapping has enabled emission spectroscopy of a high-temperature microparticle to clarify the size effects of thermal radiation.
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.
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| Free Research Field |
量子エレクトロニクス
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