We propose a hybrid silicon waveguide scheme to avoid the impact of noise photons induced by pump lights in application scenarios of quantum photonic circuits with quantum light sources.The scheme is composed of strip...We propose a hybrid silicon waveguide scheme to avoid the impact of noise photons induced by pump lights in application scenarios of quantum photonic circuits with quantum light sources.The scheme is composed of strip waveguide and shallow-ridge waveguide structures.It utilizes the difference of biphoton spectra generated by spontaneous four-wave mixing(SFWM)in these two waveguides.By proper pumping setting and signal/idler wavelength selection,the generation of desired photon pairs is confined in the strip waveguide.The impact of noise photons generated by SFWM in the shallow-ridge waveguide can be avoided.Hence,the shallowridge waveguide could be used to realize various linear operation devices for pump light and quantum state manipulations.The feasibility of this scheme is verified by theoretical analysis and a primary experiment.Two applications are proposed and analyzed,showing its great potential in silicon-based quantum photonic circuits.展开更多
An optomechanical crystal cavity with nonsuspended structure using As_(2)S_(3) material is proposed. The principle of mode confinement in the nonsuspended cavity is analyzed, and two different types of optical and aco...An optomechanical crystal cavity with nonsuspended structure using As_(2)S_(3) material is proposed. The principle of mode confinement in the nonsuspended cavity is analyzed, and two different types of optical and acoustic defect modes are calculated through appropriate design of the cavity structure. An optomechanical coupling rate of 82.3 kHz is obtained in the proposed cavity, and the designed acoustic frequency is 3.44 GHz. The acoustic mode coupling between two nonsuspended optomechanical crystal cavities is also demonstrated, showing that the proposed cavity structure has great potential for realizing further optomechanical applications in multicavity systems.展开更多
基金National Key R&D Program of China(2017YFA0303704,2018YFB2200400)National Natural Science Foundation of China(61575102,61621064,61875101,91750206)+1 种基金Natural Science Foundation of Beijing Municipality(Z180012)Beijing Academy of Quantum Information Sciences(Y18G26)。
文摘We propose a hybrid silicon waveguide scheme to avoid the impact of noise photons induced by pump lights in application scenarios of quantum photonic circuits with quantum light sources.The scheme is composed of strip waveguide and shallow-ridge waveguide structures.It utilizes the difference of biphoton spectra generated by spontaneous four-wave mixing(SFWM)in these two waveguides.By proper pumping setting and signal/idler wavelength selection,the generation of desired photon pairs is confined in the strip waveguide.The impact of noise photons generated by SFWM in the shallow-ridge waveguide can be avoided.Hence,the shallowridge waveguide could be used to realize various linear operation devices for pump light and quantum state manipulations.The feasibility of this scheme is verified by theoretical analysis and a primary experiment.Two applications are proposed and analyzed,showing its great potential in silicon-based quantum photonic circuits.
基金National Key Research and Development Program of China(2018YFB2200400)Beijing Municipal Natural Science Foundation(Z180012)+2 种基金National Natural Science Foundation of China(61775115,61875101,91750206)Beijing Academy of Quantum Information Sciences(Y18G26)Tsinghua University Initiative Scientific Research Program。
文摘An optomechanical crystal cavity with nonsuspended structure using As_(2)S_(3) material is proposed. The principle of mode confinement in the nonsuspended cavity is analyzed, and two different types of optical and acoustic defect modes are calculated through appropriate design of the cavity structure. An optomechanical coupling rate of 82.3 kHz is obtained in the proposed cavity, and the designed acoustic frequency is 3.44 GHz. The acoustic mode coupling between two nonsuspended optomechanical crystal cavities is also demonstrated, showing that the proposed cavity structure has great potential for realizing further optomechanical applications in multicavity systems.
