Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 29, Issue 9, Pages 771-774Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2017.2685430
Keywords
Resonator filters; integrated optics; waveguide couplers; silicon nitride
Funding
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning
- Natural Science Foundation of Shanghai [17ZR1443400]
- Hujiang Foundation of China [D15014]
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A tunable three-dimensional silicon nitride racetrack resonator was experimentally demonstrated, with a microring resonator on a bottom layer and a feedback cross-coupled waveguide on a top layer. At a 1559.3-nm wavelength, an extinction ratio of more than 14 dB and free spectral range of 2.7 nm can be realized with a quality factor of about 1.88 x 10(4). The filter performance, such as the resonance wavelength and extinction ratio, can be thermo-optically tuned based on the electrical control of a heater above the feedback waveguide. The presented device has a potential to be applied as a tunable modulator/switch as well as a highly sensitive sensor.
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