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Confined optical modes and amplified spontaneous emission from a microtube cavity formed by vacuum assisted filtration

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6 Author(s)
Balakrishnan, S. ; School of Chemistry, Trinity College Dublin, Dublin 2, Ireland ; Gunko, Y. ; Rakovich, Yu.P. ; Donegan, J.F.
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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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Applied Physics Letters  (Volume:89 ,  Issue: 14 )