High-contrast switching and high-efficiency extracting for spontaneous emission based on tunable gap surface plasmon.

ABSTRACT: Controlling spontaneous emission at optical scale lies in the heart of ultracompact quantum photonic devices, such as on-chip single photon sources, nanolasers and nanophotonic detectors. However, achiving a large modulation of fluorescence intensity and guiding the emitted photons into low-loss nanophotonic structures remain rather challenging issue. Here, using the liquid crystal-tuned gap surface plasmon, we theoretically demonstrate both a high-contrast switching of the spontaneous emission and high-efficiency extraction of the photons with a specially-designed tunable surface plasmon nanostructures. Through varying the refractive index of liquid crystal, the local electromagnetic field of the gap surface plasmon can be greatly modulated, thereby leading to the swithching of the sponta

SUBMITTER: Hao H 

PROVIDER: S-EPMC6062572 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature