Free spectral range magnetic tuning of an integrated microcavity
作者机构：Beijing National Laboratory for Condensed Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing 100190China University of Chinese Academy of SciencesBeijing 100094China Songshan Lake Materials LaboratoryDongguanGuangdong 523808China State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronicsSchool of PhysicsPeking UniversityBeijing 100871China
出 版 物：《Fundamental Research》 (自然科学基础研究（英文版）)
年 卷 期：2023年第3卷第3期
页 面：351-355页
核心收录：
学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程]
基 金：funding support from the National Natural Science Foundation of China(91950118,62222515,12174438,11934019) the National Key Research and Development Program of China(2021YFA1400700) the basic frontier science research pro-gram of Chinese Academy of Sciences(ZDBS-LY-JSC003)
主 题：Optical microcavities Tunable microcavities Optomechanics Magnetic tuning Integrated photonic devices
摘 要：Tunable whispering-gallery-mode(WGM)microcavities are promising devices for reconfigurable photonic applications such as widely tunable integrated lasers and reconfigurable optical filters for optical communication and information *** up these devices demands the ability to tune the optical resonances in an integrated manner over a full free spectral range(FSR).Here we propose a high-speed full FSR magnetic tuning scheme of an integrated silicon nitride(Si_(3)N_(4))double-disk *** coating a magnetostrictive film on the spokes and the central pad of the Si_(3)N_(4) cavity,magnetic tuning can be realized using a microcoil integrated on the same *** FSR tuning can be achieved by combining magnetostrictive strain with strong optomechanical interactions provided by the double-disk *** calculate the required magnetic flux density to tune an FSR(B_(FSR))as a function of several key geometric parameters,including the air gap,radius,width of the spokes and ring of the double-disk cavities,as well as the thickness of the magnetostrictive *** proposed structure enables a full FSR tuning with a required magnetic flux density of milli-Tesla(mT)*** also study the dynamic response of the integrated device with an alternating current(AC)magnetic field driving,and find that the tuning speed can reach hundreds of kHz in the air.
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