Hwang, Hyeon Heo, Hyungjun Ko, Kiyoung Nurrahman, Mohamad Reza Moon, Kiwon Ju, Jung Jin Han, Sang-Wook Jung, Hojoong Lee, Hansuek Seo, Min-Kyo 2024-01-19T10:32:13Z 2024-01-19T10:32:13Z 2023-03-02 2022-12 0146-9592 https://pubs.kist.re.kr/handle/201004/114201 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 electro-optically 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 similar to 344.2MHz and rarely changed the intrinsic quality (Q) factor of 4.6x10(5). Our device is a promising element in on-chip coherent photon storage/retrieval and its applications. (c) 2022 Optica Publishing Group English Optical Society of America Electro-optic control of the external coupling strength of a high-quality-factor lithium niobate micro-resonator Article 10.1364/OL.472956 1 Optics Letters, v.47, no.23, pp.6149 - 6152 Optics Letters 47 23 6149 6152 N scie scopus 000926187200005 2-s2.0-85143598788 Optics Optics Article MODULATORS BREAKING