谐振器
材料科学
热的
放松(心理学)
表征(材料科学)
光子学
光学
低语长廊波浪
光电子学
热导率
工作(物理)
光学腔
激光器
纳米技术
物理
热力学
心理学
复合材料
社会心理学
作者
Weijian Chen,Jian‐Gang Zhu,Şahin Kaya Özdemir,Bo Peng,Lan Yang
摘要
Thermal properties of a photonic resonator are determined not only by intrinsic properties of materials, such as thermo-optic coefficient, but also by the geometry and structure of the resonator. Techniques for characterization and measurement of thermal properties of individual photonic resonator will benefit numerous applications. In this work, we demonstrate a method to optically measure the thermal relaxation time and effective thermal conductance of a whispering gallery mode microcavity using optothermal effect. Two nearby optical modes within the cavity are optically probed, which allows us to quantify the thermal relaxation process of the cavity by analyzing changes in the transmission spectra induced by optothermal effect. We show that the effective thermal conductance can be experimentally deduced from the thermal relaxation measurement, and it can be tailored by changing the geometric parameters of the cavity. The experimental observations are in good agreement with the proposed analytical modeling. This method can be applied to various resonators in different forms.
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