Bandwidth-tunable silicon nitride microring resonators |
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| Authors: | Jiacheng Liu Chao Wu Gongyu Xia Qilin Zheng Zhihong Zhu Ping Xu |
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| Affiliation: | Hunan Provincial Key Laboratory of Novel Nano-Optoelectronic Information Materials and Device, Institute for Quantum Information and State Key Laboratory of High Performance Computing, College of Advanced Interdisciplinary Studies&College of Computer, National University of Defense Technology, Changsha 410073, China |
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| Abstract: | We designed a reconfigurable dual-interferometer coupled silicon nitride microring resonator. By tuning the integrated heater on interferometer's arms, the "critical coupling" bandwidth of resonant mode is continuously adjustable whose quality factor varies from 7.9×104 to 1.9×105 with the extinction ratio keeping higher than 25 dB. Also a variety of coupling spanning from "under-coupling" to "over-coupling" were achieved, showing the ability to tune the quality factor from 6.0×103 to 2.3×105. Our design can provide an adjustable filtering method on silicon nitride photonic chip and contribute to optimize the nonlinear process for quantum photonics and all-optical signal processing. |
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| Keywords: | silicon nitride microring resonators Mach-Zehnder interferometer ring filter nonlinear optics |
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