Yu.P. Rakovich, J.F. Donegan S. Balakrishnan, Y. Gun'ko T. Perova, Confined optical modes and amplified spontaneous emission from a microtube cavity formed by vacumm assisted filtration, Applied Physics Letters, 89, 143113, 2006, 143113
Applied Physics Letters 89 143113
The authors demonstrate a new route to the fabrication of individual aluminosilicate microtubes that can act as micron-scale optical cylindrical resonators. The microtubes were prepared using a simple vacuum assisted wetting and filtration through a microchannel glass matrix. Microphotoluminescence spectra of the microtube cavity show sharp resonant modes with quality factors up to 3200. A strong reduction of the emission decay time at high excitation power confirms the occurrence of amplified spontaneous emission from a single microtube.
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