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Free keywords:
Photoluminescence spectrum; Single-crystalline; Ultra-small; Visible wavelengths, Microspheres; Photoluminescence; Zinc oxide, Whispering gallery modes
Abstract:
We present photoluminescence spectra of ultrasmall zinc oxide microspheres with sharp resonances of whispering gallery modes covering the whole visible window and compare with theoretical analyses. © 2013 Optical Society of America.