A simple method for characterizing and engineering thermal relaxation of an optical microcavity

被引：18

作者：

Chen, Weijian ^{[1
]}

Zhu, Jiangang ^{[1
,2
]}

Ozdemir, Sahin Kaya ^{[1
]}

Peng, Bo ^{[1
,3
]}

Yang, Lan ^{[1
]}

机构：

[1] Washington Univ, Dept Elect & Syst Engn, St Louis, MO 63130 USA

[2] Los Alamos Natl Lab, Los Alamos, NM 87544 USA

[3] IBM Thomas J Watson Res Ctr, Yorktown Hts, NY 10598 USA

来源：

APPLIED PHYSICS LETTERS | 2016年 / 109卷 / 06期

关键词：

LABEL-FREE DETECTION; MICRORESONATOR; MICROLASERS; RESONATORS;

D O I：

10.1063/1.4960665

中图分类号：

O59 [应用物理学];

学科分类号：

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. Published by AIP Publishing.

引用

页数：4

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