Hollow Whispering Gallery Mode Resonators: from Fabrication to Application

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Bibliographic Information

Title
Hollow Whispering Gallery Mode Resonators: from Fabrication to Application
Other Title
  • 中空構造のウィスパリングギャラリーモード光共振器：製造およびその応用
Author
霞江, 翔
Author
Kasumie, Sho
University
Okinawa Institute of Science and Technology Graduate University
Types of degree
Doctor of Philosophy
Grant ID
甲第36号
Degree year
2019-09-30

Description

Whispering gallery mode resonators (WGMRs) are ultrahigh quality optical resonators, where Q-factors higher than 107 are easily achieved. They can be used as compact optical sensors, laser sources, and experimental platforms to study optomechanics and nonlinear optics, for example. A type of WGMR with a hollow structure first appeared in the literature in 2010. Such a WGMR is called a microbubble resonator (MBR) named after its geometrical structure. The wall thickness of an MBR is, typically, quite thin and this leads to several interesting properties: (i) the resonant frequency can be tuned by inserting air pressure, (ii) geometrical dispersion is changed from normal bulk WGMRs, and (iii) when the bubble is filled with water (or other liquids), the resonant optical field can be distributed within, and have an interaction with, the liquid core. In this thesis, we discuss the fabrication method for MBRs and their application in a coupled cavity system, as a tunable laser, and for frequency comb generation at near visible wavelengths. In future, transient sensing may be achieved in a liquid core MBR and different patterns of cascaded Raman scattering may be controlled by inserting air pressure into the MBR. Preliminary work on these topics is also included in this dissertation.

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2020-10-07 再収集

2023-09-04 再収集

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