Tunable single-photon diode and circulator via chiral waveguide–emitter couplings

Wang, Xin; Shui, Tao; Li, Ling; Li, Xiyun; Wu, Zhen; Yang, Wen-Xing

doi:10.1088/1612-202x/ab8557

Cited by 13 publications

(7 citation statements)

References 47 publications

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“…Optical nonreciprocity means that the properties of transmitted fields become asymmetry when exchanging the positions of source and detector. [10] Various nonreciprocal phenomena have been intensively investigated, including nonreciprocal transmission and amplification, [11][12][13][14][15][16] nonreciprocal (unconventional) photon blockade, [17][18][19][20] nonreciprocal signal routing, [21][22][23] and nonreciprocal quantum entanglement, [24][25][26] etc. The strategies for realization of nonreciprocity cover magneto-optical materials in conjunction with a magnetic field, [27,28] time modulation of the optical properties, [29] optical nonlinearity, [13,30,31] and synthetic magnetism, [32] etc.…”

Section: Introductionmentioning

confidence: 99%

Nonreciprocal two-photon transmission and statistics in a chiral waveguide QED system

et al. 2022

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We study the nonreciprocal properties of transmitted photons in the chiral waveguide QED system, including single- and two-photon transmissions and second-order correlations. For the single-photon transmission, the nonreciprocity is induced by the effects of chiral coupling and atomic dissipation in the weak coupling region. It vanishes in the strong coupling regime when the effect of atomic dissipation becomes ignorable. In the case of two-photon transmission, there exist two ways of going through the emitter: independently as plane waves and formation of bound state. Besides the nonreciprocal behavior of plane waves, the bound state that differs in two directions also alters transmission probabilities. In addition, the second-order correlation of transmitted photons depends on the interference between plane wave and bound state. The destructive interference leads to the strong antibunching in the weak coupling region, while the effective formation of bound state leads to the strong bunching in the intermediate coupling region. However, the negligible interactions for left-propagating photons hardly change the statistics of the input coherent state.

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Section: Introductionmentioning

confidence: 99%

Nonreciprocal two-photon transmission and statistics in a chiral waveguide QED system

et al. 2022

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“…[3,4,9] Based on the strong coupling, photon scattering properties in the one-dimensional waveguide have also been investigated widely. By controlling single photon reflection and transmission spectra, different kinds of quantum devices and quantum logic gates have been proposed and realized, which includes single photon switching, [10][11][12] transistors, [13][14][15] diodes, [16,17] routers, [22][23][24]27] circulators, [28,29] and frequency-combs. [25,26] An atom-waveguide system with strong coupling is also a good platform to investigative many quantum effects, such as collective emission, [39] collective Lamb shift, [40] and photon bound states, [41] due to the phase (or time delay) induced by photons propagating in waveguides.…”

Section: Introductionmentioning

confidence: 99%

Fano interference and transparency in a waveguide-nanocavity hybrid system with an auxiliary cavity*

Shu¹,

Ma²,

Huang³

et al. 2021

Chinese Phys. B

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We investigate theoretically single photon transport in one-dimensional waveguide coupled to a pair of cavities, which are denoted by the first cavity and the auxiliary cavity. Two cases with no atom and one atom embedded in the first cavity are discussed. The Fano dips in the transmission spectrum and locations of transparency window are calculated. When no atom is embedded in the first cavity, there exists a transparency window under the condition that the first cavity and the auxiliary cavity are not resonant. The locations of the transparency window and Fano line type depend strongly on the eigen frequency of the auxiliary cavity and the coupling strength between the auxiliary cavity and the waveguide. When one atom is embedded in the first cavity, we show that the transparency window exists even though the first cavity, the atom and the auxiliary cavity are resonant. The Fano line type is strongly dependent on the eigen frequency of the auxiliary cavity and the coupling strength. Our results have potential applications in design of quantum devices at the level of single photon, such as single photon switch and single photon routers.

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“…Later, a targeted photonic router [39] was controlled by the external field and the incident photon was non-resonant. A single-photon diode has been investigated in the chiral systems of two waveguides coupled to a multilevel atom [40][41][42] and a waveguide coupled to multiple emitters [43]. By employing chiral cross-Kerr nonlinearity [44], an isolator and circulator were also achieved.…”

Section: Introductionmentioning

confidence: 99%

High-efficiency single-photon router in a network with multiple outports based on chiral waveguide–emitter couplings

Wang

et al. 2021

Laser Phys. Lett.

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We propose a potentially practical scheme for constructing a quantum network based on a system where three waveguides are coupled to two two-level atoms. In the case of chiral couplings between the waveguides and atoms, we realize a directed single-photon router and the efficiency of single-photon routing reaches 100%. In addition, in this network, the photon input from one port of the channel can be fully routed to any outport of the other two channels by modulating the coupling strength of the waveguides and atoms and the frequency of the incident photon. Thus, a quantum network can be constructed based on our scheme. The influence of the ratio of chiral coupling strength on the properties of the single-photon router is also shown. We also show how the efficiency of routing is affected by system dissipation.

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Tunable single-photon diode and circulator via chiral waveguide–emitter couplings

Cited by 13 publications

References 47 publications

Nonreciprocal two-photon transmission and statistics in a chiral waveguide QED system

Nonreciprocal two-photon transmission and statistics in a chiral waveguide QED system

Fano interference and transparency in a waveguide-nanocavity hybrid system with an auxiliary cavity*

High-efficiency single-photon router in a network with multiple outports based on chiral waveguide–emitter couplings

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