Frequency multiplexing single photon circulator for immunizing backscattering
A frequency multiplexing, single-photon technology, applied in the field of optical quantum information, can solve problems such as difficult to achieve miniaturization and integration, and achieve the effect of good robustness
Active Publication Date: 2021-10-22
NANJING UNIV
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Problems solved by technology
In quantum communication, single photons are used the most, and single photon circulators in the prior art generally rely on weak magneto-optical effects, and need to provide magnetic field devices, so that it is difficult to achieve miniaturization and integration
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[0017] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.
[0018] The invention discloses a frequency multiplexing single photon circulator immune to backscattering, its structure is as follows figure 1 As shown, it includes: a first linear waveguide 1, a second linear waveguide 2, a periodically coupled resonant optical waveguide 3;
[0019] The first linear waveguide 1 and the second linear waveguide 2 are arranged in parallel; the periodically coupled resonant optical waveguide 3 is located between the first linear waveguide 1 and the second linear waveguide 2;
[0020] The first linear waveguide and the second linear waveguide are usually made of silicon-based materials; the two ends of the first linear waveguide and the second linear waveguide are the forward port and the reverse port respectively, and the positive The forward port is on the same side, and the reverse port is on the same side; f...
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The invention discloses a frequency multiplexing single photon circulator for immunizing backscattering. The frequency multiplexing single photon circulator comprises a first linear waveguide, a second linear waveguide and a periodic coupling resonance optical waveguide. The first linear waveguide and the second linear waveguide are arranged in parallel; the periodic coupling resonance optical waveguide is located between the first linear waveguide and the second linear waveguide; the periodic coupling resonance optical waveguide comprises at least one coupling resonance optical unit, each coupling resonance optical unit comprises a first annular cavity, a second annular cavity and quantum dots, and the first annular cavity and the second annular cavity are the same in structure and are directly coupled; the first annular cavity is in chiral coupling with the quantum dots; and the resonant frequency of the quantum dots is the same as the resonant frequency of the first annular cavity and the resonant frequency of the second annular cavity. According to the single photon circulator, time reversal symmetry can be broken without a magneto-optical effect, miniaturization and integration of a device are facilitated, and propagation of a single photon can be prevented from being influenced by backscattering.
Description
technical field [0001] The invention belongs to the technical field of optical quantum information, and in particular relates to a frequency multiplexing single photon circulator immune to backscattering. Background technique [0002] An optical circulator is an optical device with multiple ports, which restricts the direction of light so that light can only be transmitted in one direction, and has important applications in optical quantum information processing. In quantum communication, single photons are used the most, and single photon circulators in the prior art generally rely on weak magneto-optic effects, requiring a magnetic field device, so that it is difficult to achieve miniaturization and integration. Contents of the invention [0003] Purpose of the invention: The present invention aims to provide a single photon circulator, which can break the time-reversal symmetry without the magneto-optic effect, which is beneficial to the miniaturization and integration ...
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Login to View More IPC IPC(8): G02B6/27
CPCG02B6/2746
Inventor 夏可宇唐江山陆延青
Owner NANJING UNIV