Observation of whispering gallery modes in cathode luminescence in TiO2:Eu3+ microspheres | Zendy

Makoto Tomita | Zendy; Kouki Totsuka | Zendy; Hiroshi Ikari | Zendy; Kenji Ohara | Zendy; Hidenori Mimura | Zendy; Hideyuki Watanabe | Zendy; Hiroshi Kume | Zendy; Takahiro Matsumoto | Zendy

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Observation of whispering gallery modes in cathode luminescence in TiO2:Eu3+ microspheres

Author(s) -

Makoto Tomita,

Kouki Totsuka,

Hiroshi Ikari,

Kenji Ohara,

Hidenori Mimura,

Hideyuki Watanabe,

Hiroshi Kume,

Takahiro Matsumoto

Publication year - 2006

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.2335578

Subject(s) - whispering gallery wave , phosphor , luminescence , cathode , microsphere , materials science , optoelectronics , whispering gallery , optics , spectral line , glass microsphere , chemistry , physics , resonator , astronomy , chemical engineering , engineering

We report cavity enhanced periodic structures in cathode luminescence spectra in TiO2:Eu3+ microspheres ranging from 6.2to12.2μm in diameter. The spectral structures observed at the accelerating voltage below 10kV are attributed to the lower order whispering galley modes, while the additional components appearing at 20kV are to the higher order modes within the microsphere. These observations illustrate that the basic properties of phosphors can be advanced from the point of view of cavity quantum electrodynamics by fabricating a microcavity structure onto a single phosphor crystal.

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