Abstract
Cavity quantum electrodynamics focuses on enhancing the light-matter interactions for a broad spectrum of applications, including lasers, quantum information processing, spectroscopy, and imaging. As photonic cavities confine light with the constraint of diffraction limit while plasmonic cavities suffer from Ohmic loss, hybrid plasmonic-photonic microcavities have emerged as a versatile platform to overcome the limitations in pure systems and enhance lightmatter interactions reaching the strong coupling regime. The present Perspective starts from the fundamentals of light-matter interaction, followed by the review of both theoretical and experimental developments achieved recently in hybrid plasmonic-photonic systems. Together with the fascinating optical properties of hybrid systems, diverse potential applications are discussed, for example, quantum state preparation and operation, nonlinear optics, molecular spectroscopy, and sensing. The possible challenges posed to nanofabrication and characterization are also briefly covered.
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