Phase-controlled single-photon nonreciprocal transmission in a one-dimensional waveguide

Wang, Zhihai; Du, Lei; Li, Yong; Liu, Yu-xi

doi:10.1103/physreva.100.053809

Cited by 29 publications

(20 citation statements)

References 74 publications

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“…All these advantages are beneficial for improving the purity and efficiency of 1PB. Our work demonstrates the novel application of plasmonicphotonic cavity, and provides a theoretical framework valid for a wide range of systems, such as the photonic-crystal architectures in nanophotonics [41,42], cavity magnonics in microwave systems [43] and circuit QED systems [44], opening up the possibilities for exploring the exotic quantum effects of nonreciprocal light-matter interactions.…”

Section: Discussionmentioning

confidence: 90%

Plasmonic-photonic cavity for high-efficiency single-photon blockade

Liu

Liao

2021

Sci. China Phys. Mech. Astron.

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The generation and manipulation of single photons are crucial in advanced quantum technologies, such as quantum communication and quantum computation devices. High-purity single photons can be generated from classical light using the single-photon blockade (1PB). However, the efficiency and purity are exclusive in 1PB, which hinders its practical applications. Here, we show that the resonantly coupled plasmonic-photonic cavity can boost the efficiency of single-photon generation by more than three orders of magnitude compared with that of all-dielectric microcavity. This significant improvement is attributed to two new mechanisms of atom-microcavity coupling after introducing the plasmonic cavity: the formation of a quasi-bound state and the transition to the nonreciprocal regime, due to the destructive interference between the coupling pathways and the nonzero relative phase of the closed-loop coupling, respectively. The quasi-bound state has a relatively small decaying, while its effective coupling strength is significantly enhanced. Suppressing the dissipative component of the effective atom-microcavity coupling in the nonreciprocal regime can further improve single-photon performance, particularly without temporal oscillations. Our study demonstrates the possibility of enhancing the intrinsically low efficiency of 1PB in low excitation regime, and unveils the novel light-matter interaction in hybrid cavities.single-photon blockade, atom-photon quasi-bound state, plasmonic-photonic cavity

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Section: Discussionmentioning

confidence: 90%

Plasmonic-photonic cavity for high-efficiency single-photon blockade

Liu

Liao

2021

Sci. China Phys. Mech. Astron.

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“…Here and hereafter, we denote ω(k) by ω for simplicity. Assuming that |g(ω)| 2 /v g = γ/2 is constant under the Markovian approximation [32][33][34] and ω 0 is far away from the cut-off frequency of the waveguide such that its dispersion can be approximately linearized as ω = ω 0 + ν if [39,53], we have…”

Section: Discussionmentioning

confidence: 99%

Single-photon nonreciprocal excitation transfer with non-Markovian retarded effects

Du,

Cai,

et al. 2021

Preprint

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We study at the single-photon level the nonreciprocal excitation transfer between emitters coupled with a common waveguide. Non-Markovian retarded effects are taken into account due to the large separation distance between different emitter-waveguide coupling ports. It is shown that the excitation transfer between the emitters of a small-atom dimer can be obviously nonreciprocal by introducing between them a coherent coupling channel with nontrivial coupling phase. We prove that for dimer models the nonreciprocity cannot coexist with the decoherence-free giant-atom structure although the latter markedly lengthens the lifetime of the emitters. In view of this, we further propose a giant-atom trimer which supports both nonreciprocal transfer (directional circulation) of the excitation and greatly lengthened lifetime. Such a trimer model also exhibits incommensurate emitter-waveguide entanglement for different initial states in which case the excitation transfer is however reciprocal. We believe that the proposals in this paper are of potential applications in large-scale quantum networks and quantum information processing.

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“…Now we consider that a single photon is incident from the left side of the waveguide. In this case φ R (x) and φ L (x) can be written as [17] φ…”

Section: Appendix A: Verification In Real Spacementioning

confidence: 99%

“…This field has been sufficiently explored with various candidates such as superconducting circuits [3][4][5], optical waveguides [6,7], and coupledresonator arrays [8,9]. Up to now, a series of novel phenomena such as chiral photon-atom interactions [10,11], phase transitions [12,13], topologically induced unconventional quantum optics [14], and single-photon nonreciprocity [15][16][17] have been achieved based on various techniques and engineered configurations. In particular, waveguide QED is theoretically predicted [18][19][20][21][22] and experimentally verified [23][24][25] to enable indirect couplings between spatially separated emitters, which have potential applications in large-scale quantum network.…”

Section: Introductionmentioning

confidence: 99%

Controllable optical response and tunable sensing based on self interference in waveguide QED systems

Du,

Wang,

2020

Preprint

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We study the self interference effect of a resonator coupled with a bent waveguide at two separated ports. Such interference effects are shown to be similar for the cases of standing-wave and travelingwave resonators, while in the system of two separated resonators indirectly coupled via a waveguide, the coupling forms and the related interference effects depend on which kind of resonators is chosen. Due to the self interference, controllable optical responses including tunable linewidth and frequency shift, and optical dark state can be achieved. Moreover, we consider a self-interference photon-magnon hybrid model and show phase-dependent Fano-like line shapes which have potential applications in frequency sensing. The photon-magnon hybridization can not only enhance the sensitivity and provide tunable working region, but also enables optical readout of the magnetic field strength in turn. The results in this paper provide a deeper insight into the self interference effect and its potential applications.

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Phase-controlled single-photon nonreciprocal transmission in a one-dimensional waveguide

Cited by 29 publications

References 74 publications

Plasmonic-photonic cavity for high-efficiency single-photon blockade

Plasmonic-photonic cavity for high-efficiency single-photon blockade

Single-photon nonreciprocal excitation transfer with non-Markovian retarded effects

Controllable optical response and tunable sensing based on self interference in waveguide QED systems

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