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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 33, Iss. 4 — Feb. 15, 2008
  • pp: 336–338

Depth profiling the whispering gallery modes in Ti O 2 : Eu 3 + microspheres using cathode luminescence

Makoto Tomita, Hiroshi Ikari, Hidenori Mimura, and Takahiro Matsumoto  »View Author Affiliations


Optics Letters, Vol. 33, Issue 4, pp. 336-338 (2008)
http://dx.doi.org/10.1364/OL.33.000336


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Abstract

The depth-resolved luminescence of whispering gallery modes (WGMs) was studied in Ti O 2 : Eu 3 + microsphere using cathode luminescence. As the penetration depth of the electron beam into the microsphere was increased through the control of the accelerating voltage, periodic structures appeared superimposed over the intrinsic transition lines of Eu 3 + , which were attributable to the cavity enhancement effect of the spontaneous emission by WGM resonance. The calculated radial intensity distribution of the WGM and the penetration depth explained the observed dependence of the WGM structure’s visibility on the accelerating voltage.

© 2008 Optical Society of America

OCIS Codes
(220.4000) Optical design and fabrication : Microstructure fabrication
(250.1500) Optoelectronics : Cathodoluminescence
(290.4020) Scattering : Mie theory
(350.3950) Other areas of optics : Micro-optics

ToC Category:
Optoelectronics

History
Original Manuscript: October 30, 2007
Manuscript Accepted: December 17, 2007
Published: February 11, 2008

Citation
Makoto Tomita, Hiroshi Ikari, Hidenori Mimura, and Takahiro Matsumoto, "Depth profiling the whispering gallery modes in TiO2:Eu3+ microspheres using cathode luminescence," Opt. Lett. 33, 336-338 (2008)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-33-4-336


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