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Title: Optical micro cavities fabricated using direct proton beam writing
Authors: Kumar, V.S.
Turag, S.P.
Teo, E.J.
Bettio, A. 
Keywords: Dye doped polymers
Optical micro cavity
Polymer lasers
Proton beam writing
Issue Date: 2012
Citation: Kumar, V.S., Turag, S.P., Teo, E.J., Bettio, A. (2012). Optical micro cavities fabricated using direct proton beam writing. Proceedings of SPIE - The International Society for Optical Engineering 8249 : -. ScholarBank@NUS Repository.
Abstract: Proton beam writing (PBW) is a high-resolution direct write lithographic technique suitable for the fabrication of micro/nano optical components with smooth vertical sidewalls. In the present work PBW was used to fabricate smooth micro cavities in negative tone photoresist SU-8 and Rhodamine B doped SU-8. Two different laser cavities based on whispering gallery mode resonators were fabricated using PBW. The laser cavities in Rhodamine B doped SU-8 resist were optically pumped with a pulsed frequency doubled Nd: YAG laser, and emits light in the chip plane at 643 nm. The presented laser cavities showed pump threshold as low as 3 μJ/mm2, which is the lowest threshold reported in planar cavities fabricated in Rhodamine B dye based polymer laser cavities. © 2012 SPIE.
Source Title: Proceedings of SPIE - The International Society for Optical Engineering
ISBN: 9780819488923
ISSN: 0277786X
DOI: 10.1117/12.908319
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