We study light transmission and reflection from an integrated microresonator device,formed by a circular microresonator coupled to a bus waveguide,with an embedded S-shaped additional crossover waveguide element that ...We study light transmission and reflection from an integrated microresonator device,formed by a circular microresonator coupled to a bus waveguide,with an embedded S-shaped additional crossover waveguide element that selectively couples counter-propagating modes in a propagation-direction-dependent way.The overall shape of the device resembles a“taiji”symbol,hence its name.While Lorentz reciprocity is preserved in transmission,the peculiar geometry allows us to exploit the non-Hermitian nature of the system to obtain high-contrast unidirectional reflection with negligible reflection for light incident in one direction and a significant reflection in the opposite direction.展开更多
基金Provincia Autonoma di Trento,Italy(Grandi Progetti SIQURO)H2020-FETFLAG-2018-2020 Quantum Flagship(820392“PhoQuS”)+3 种基金FET-Open(n.737017“MIR-BOSE”)Spanish Ministry of Economy,Industry and Competitiveness(MINECO)(TEC2015-74405-JIN)European Commission(Marie Skłodowska–Curie Action,Grant No.656093“SynOptic”)Royal Society(UF160112,RGF/EA/180121,and RGF/R1/180071).
文摘We study light transmission and reflection from an integrated microresonator device,formed by a circular microresonator coupled to a bus waveguide,with an embedded S-shaped additional crossover waveguide element that selectively couples counter-propagating modes in a propagation-direction-dependent way.The overall shape of the device resembles a“taiji”symbol,hence its name.While Lorentz reciprocity is preserved in transmission,the peculiar geometry allows us to exploit the non-Hermitian nature of the system to obtain high-contrast unidirectional reflection with negligible reflection for light incident in one direction and a significant reflection in the opposite direction.
