Photowritten high-Q cavities in two-dimensional chalcogenide glass photonic crystals
Michael W Lee, Christian Grillet, Snjezana Tomljenovic-Hanic, Eric C Maegi, David J Moss, Benjamin J Eggleton, Xin Gai, Steve Madden, Duk-Yong Choi, Douglas AP Bulla, Barry Luther-Davies
OPTICS LETTERS | OPTICAL SOC AMER | Published : 2009
We demonstrate a high-Q(approximately 125,000) photonic crystal (PhC) cavity formed using a postprocessing optical exposure technique where the refractive index of a photosensitive chalcogenide PhC is modified locally. The evolution of the cavity resonances was monitored in situ during writing using a tapered fiber evanescent coupling system, and the Q of 125,000 represents 1 order of magnitude increase over previously reported cavities in two-dimensional chalcogenide glass PhC.