Optical microcavity

About: Optical microcavity is a research topic. Over the lifetime, 2599 publications have been published within this topic receiving 72125 citations. The topic is also known as: optical microcavities.

Multimode Interference Induced Optical Routing in an Optical Microcavity

Abstract: Optical nonreciprocity and routing using optocal microcavities draw much atttention in recent years. Here, we report the results of the study on the nonreciprocity and routing using optomechanical multimode interference in an optical microcavity. The optomechanical system used here possesses multi-optical modes and a mechanical mode. Optomechanical induced transparency and absorption, appear in the system due to the interference between different paths. The system can present significant nonreciprocity and routing properties when appropriate parameters of the system are set. We design quantum devices, such as diode, circulator and router, which are important applications. Our work shows that optomechanical multimode system can be used as a promising platform for buliding photonic and quantum network.

Modal coupling strength in a fibre taper coupled silica microsphere

Abstract: The character of the modal coupling strength β between clockwise (CW) and counterclockwise (CCW) whispering gallery modes (WGMs) represents an intrinsic property of a microsphere cavity, which is an important factor for the application of both micro-laser and cavity QED. Depending on a fibre taper coupled microsphere with quality factor larger than 107, modal coupling has been observed, while reflection spectra have been captured to derive the practical modal coupling strength. Upon obtaining results the modal coupling strength is confirmed to be a constant determined only by a microcavity and modes under excitation. This measurement system and results enable ways not only to acquire the material character of a microcavity, but also to analyse microsphere-based cavity QED research.

Coupling between one-dimensional excitons and two-dimensional photons: Quantum wires in a microcavity.

Abstract: Maxwell equations are solved for the light incident on the microcavity with an embedded periodical grating of quantum wires, taking into account the nonlocal excitonic contributions to the dielectric polarization. The dispersion of exciton polaritons created due to the coupling of one-dimensional excitons and two-dimensional photon modes is obtained. The backscattering of light due to its resonant diffraction at the grating of quantum wires is found to result in the four-mode polaritonic spectrum, while numerically calculated spectra of light reflection, absorption, and diffraction scattering show from two to four resonant features. \textcopyright{} 1996 The American Physical Society.

Terahertz spoof plasmonic coaxial microcavity.

Abstract: We theoretically demonstrate a subwavelength spoof surface-plasmon–polariton (SPP) microcavity on a planar metallic surface working at the terahertz regime with a high-quality factor and ultra-small mode volume. The microcavity is based on plasmonic and metamaterial notions, and it consists of an easy-to-manufacture circular aperture and a bell-shaped metallic core. It is shown that such a structure can sustain SPP eigenmodes whose fields are tightly trapped within the microcavity. Using the proposed structure, a total Q factor of 1000 (including losses from metals at low temperatures) and subwavelength mode volume of 0.00018(λ/2)3 can be achieved in the THz range for the fundamental surface-plasmonic eigenmode at room temperature. Moreover, the key figures of merit such as resonance frequency can be flexibly tuned by modifying the geometry of the microcavity, making it attractive for broad applications in filters, light sources, energy storage, and on-chip optical communications.