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Journal Article
Electro-optic control of the external coupling strength of a high-quality-factor lithium niobate micro-resonator
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- Authors
- Hyeon Hwang, Hyungjun Heo, Kiyoung Ko, Mohamad Reza Nurrahman, Kiwon Moon, Jung Jin Ju, Sang-Wook Han, Hojoong Jung, Hansuek Lee, Min-Kyo Seo
- Issue Date
- 2022-12
- Citation
- Optics Letters, v.47, no.23, pp.6149-6152
- ISSN
- 0146-9592
- Publisher
- Optical Society of America (OSA)
- Language
- English
- Type
- Journal Article
- Abstract
- Controlling the optical coupling between a micro-resonator and waveguide plays a key role in on-chip photonic circuits. Here, we demonstrate a two-point coupled lithium niobate (LN) racetrack micro-resonator that enables us to electrooptically traverse a full set of the zero-, under-, critical-, and over-coupling regimes with minimized disturbance of the intrinsic properties of the resonant mode. The modulation between the zero- and critical-coupling conditions cost a resonant frequency shift of only ~344.2 MHz and rarely changed the intrinsic quality (Q) factor of 4.6 × 105. Our device is a promising element in on-chip coherent photon storage/retrieval and its applications.
- KSP Keywords
- Electro-Optic, High-quality, Intrinsic property, Key role, Lithium Niobate, On-chip, Optical coupling, Photonic circuit, Quality-factor(Q-factor), Resonant frequency(Fr), Resonant frequency shift