High quality chalcogenide-silica hybrid wedge resonator

Title
High quality chalcogenide-silica hybrid wedge resonator
Authors
강구민Molly R. KrogstadMichael Grayson김대곤이한석Juliet T. GopinathWounjhang Park
Issue Date
2017-06
Publisher
Optics express
Citation
VOL 25, NO 13-15589
Abstract
Chalcogenide glasses, with high nonlinearity and low loss, have captured research interest as an integrated device platform for near-and mid-infrared nonlinear optical devices. Compared to silicon-based microfabrication technologies, chalcogenide fabrication processes are less mature and a major challenge is obtaining high quality devices. In this paper, we report a hybrid resonator design leveraging a high quality silica resonator to achieve high Q factors with chalcogenide. The device is composed of a thin chalcogenide layer deposited on a silica wedge resonator. The hybrid resonators exhibit loaded Q factors up to 1.5 x 10(5) in the near-infrared region. We also measured the effective thermo-optic coefficient of the device to be 5.5x10(-5)/K, which agreed well with the bulk value. Thermal drift of the device can be significantly reduced by introducing a titanium dioxide cladding layer with a negative thermo-optic coefficient.
URI
http://pubs.kist.re.kr/handle/201004/66598
ISSN
1094-4087
Appears in Collections:
KIST Publication > Article
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