Observation of whispering gallery modes in cathode luminescence in TiO{sub 2}:Eu{sup 3+} microspheres

Journal Article · Mon Aug 07 00:00:00 EDT 2006 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2335578· OSTI ID:20860662

Tomita, Makoto; Totsuka, Kouki; Ikari, Hiroshi; Ohara, Kenji; Mimura, Hidenori; Watanabe, Hideyuki; Kume, Hiroshi; Matsumoto, Takahiro ^[1]

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1. Department of Physics, Faculty of Science, Shizuoak University, 836 Ohya, Suruga-ku, Shizuoka 422-8529 (Japan)

We report cavity enhanced periodic structures in cathode luminescence spectra in TiO{sub 2}:Eu{sup 3+} microspheres ranging from 6.2 to 12.2 {mu}m in diameter. The spectral structures observed at the accelerating voltage below 10 kV are attributed to the lower order whispering galley modes, while the additional components appearing at 20 kV 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.

• OSTI ID: 20860662
• Journal Information: Applied Physics Letters, Vol. 89, Issue 6; Other Information: DOI: 10.1063/1.2335578; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
36 MATERIALS SCIENCE
CATHODES
CATHODOLUMINESCENCE
CRYSTALS
ELECTRIC POTENTIAL
EUROPIUM IONS
MICROSPHERES
PERIODICITY
PHOSPHORS
QUANTUM ELECTRODYNAMICS
TITANIUM OXIDES