Phys. Rev. A 80, 041806(R) (2009) [4 pages]Mode-selective thermal radiation from a microparticle
We experimentally demonstrate that thermal radiation from a micron-sized dielectric particle depends sensitively on its size and shape through the cavity quantum-electrodynamic effect. Our laser trapping technique levitated a high-temperature microsphere of Al2O3 and enabled emission spectroscopy of the single particle. As the particle becomes smaller, a blackbodylike spectrum turns into a spectrum dominated by multiple peaks resonant with whispering gallery modes of the spherical resonator. The observed sharp frequency selectivity is applicable to spectral control of thermal radiation. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.80.041806
DOI:
10.1103/PhysRevA.80.041806
PACS:
42.50.Wk, 44.40.+a, 42.50.Pq
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