Technologies for Smart Sensors and Sensor Fusion

9	Whispering Gallery Microcavity Sensing

Serge Vincent, Xuan Du, and Tao Lu

CONTENTS

9.1    Introduction

9.2    Basics of Whispering Gallery Microresonators

9.3    Microcavity Materials

9.4    Microcavity Structures

9.4.1    Silica Microsphere

9.4.2    Microdisk

9.4.3    Silica Microtoroid

9.4.4    Double-Disk Microresonator

9.4.5    Silicon Ring Resonator

9.4.6    Liquid-Core Optical Ring Resonator

9.4.7    Bottleneck Microresonator

9.4.8    Silica Microbubble Resonator

9.5    Reactive Sensing

9.6    Reference Interferometer Sensing

9.7    Split Frequency Sensing

9.8    Plasmonic Enhancement

9.9    Optomechanical Sensing

9.10   Sensing with Second-Harmonic Generation

9.11   Conclusion and Future Research

References

9.1  INTRODUCTION

The ...