Manipulating asymmetric photon transport through electrical control: a new strategy to construct optical diodes or isolators

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2018,（11）
• 页码范围: 1351-1352
• 页数: 2页
• 语种: 英文

摘要

Nowadays,the main barrier which restricts the applications of integrated photonics for construction of optical diodes or isolators in photonic integrated circuits is the effective asymmetric photon transport.Accordingly,a series of photonic schemes have been developed to break this conundrum [1,2].On the other hand,exciton polariton (EP) formed through the strong coupling between photons and exitons can propagate along the waveguide,which can therefore provide schemes to manipulate photons at microscale [3].The electron/hole characteristics of EP expand the functions of integrated photonic devices,but unfortunately,the overall electric neutrality still restrict the asymmetric propagation in a static electric field.Although directional exciton diffusion has been experimentally realized [4],nevertheless,asymmetric exciton diffusion has never been exploited for the electrically controlled directional light propagation.