Reconfigurable optomechanical circulator and directional amplifier

Shen, Zhen; Zhang, Yanlei; Chen, Yuan; Sun, Fang-Wen; Zou, Xu‐Bo; Guo, Guang‐Can; Zou, Chang‐Ling; Dong, Chun‐Hua

doi:10.1038/s41467-018-04187-8

Cited by 189 publications

(101 citation statements)

References 49 publications

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“…The Q factor is about 2.25 × 10 5 , corresponding to a linewidth of

0.86 GHz

. This large mode splitting will lead to applications in optical isolation, if the critical coupling is achieved, and optical circulation by a Mach–Zehnder interferometer configuration …”

Section: Experimental Setup and Resultsmentioning

confidence: 99%

Non‐Reciprocity in High‐Q Ferromagnetic Microspheres via Photonic Spin–Orbit Coupling

Chai

Zhao

Tang

et al. 2019

Laser & Photonics Reviews

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Non‐reciprocal devices serving as fundamental elements in photonic and microwave circuits have attracted great attention for its applications in both classical and quantum information processing. The spin–orbit coupling (SOC) of light in microstructures shows that the polarization affects and controls the spatial degrees of freedom of light, which could been exploited to break the reciprocity of light transmission. Here, non‐reciprocal light transmission is demonstrated experimentally in high‐quality factor yttrium iron garnet microspheres via photonic SOC and Faraday effect. By applying an magnetic field in the vertical direction of resonator equator, the degeneracy of the clockwise and counter‐clockwise whispering gallery modes are lifted. The non‐reciprocal effect is shown for both polarizations and promises applications including non‐reciprocal photonic devices, magneto‐optic modulators, and magnetometers.

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“…The Q factor is about 2.25 × 10 5 , corresponding to a linewidth of

0.86 GHz

. This large mode splitting will lead to applications in optical isolation, if the critical coupling is achieved, and optical circulation by a Mach–Zehnder interferometer configuration …”

Section: Experimental Setup and Resultsmentioning

confidence: 99%

Non‐Reciprocity in High‐Q Ferromagnetic Microspheres via Photonic Spin–Orbit Coupling

Chai

Zhao

Tang

et al. 2019

Laser & Photonics Reviews

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“…Therefore, The chiral transfer of the single phonon indicates that the synthetic flux Φ B can be employed for realizing phonon circulator. Analog to a photon circulator [72], a phonon circulator is an acoustic element with three or more ports [43,73], and will transport clockwise (or counter-clockwise) the input in the jth port as the output in the ( j±1) th port. As shown in figure 5(a), for SAW experimental implementations, the acoustic in/out-port are usually made of IDTs, which can convert the electromagnetic signals into the acoustic signals, and vice versa.…”

Section: Chiral Ground State and Phonon Circulatormentioning

confidence: 99%

Generating synthetic magnetism via Floquet engineering auxiliary qubits in phonon-cavity-based lattice

Wang

2020

New J. Phys.

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Gauge magnetic fields have a close relation to breaking time-reversal symmetry in condensed matter.In the presence of the gauge fields, we might observe nonreciprocal and topological transport. Inspired by these, there is a growing effort to realize exotic transport phenomena in optical and acoustic systems. However, due to charge neutrality, realizing analog magnetic flux for phonons in nanoscale systems is still challenging in both theoretical and experimental studies. Here we propose a novel mechanism to generate synthetic magnetic field for phonon lattice by Floquet engineering auxiliary qubits. We find that, a longitudinal Floquet drive on the qubit will produce a resonant coupling between two detuned acoustic cavities. Specially, the phase encoded into the longitudinal drive can exactly be transformed into the phonon-phonon hopping. Our proposal is general and can be realized in various types of artificial hybrid quantum systems. Moreover, by taking surface-acoustic-wave (SAW) cavities for example, we propose how to generate synthetic magnetic flux for phonon transport. In the presence of synthetic magnetic flux, the time-reversal symmetry will be broken, which allows one to realize the circulator transport and analog Aharonov-Bohm effects for acoustic waves. Last, we demonstrate that our proposal can be scaled to simulate topological states of matter in quantum acoustodynamics system.In recent years, manipulating acoustic waves at a single-phonon level has drawn a lot of attention [28], and the quantum acoustodynamics (QAD) based on piezoelectric surface acoustic waves (SAW) has emerged as a versatile platform to explore quantum features of acoustic waves [29][30][31][32][33][34][35][36]. Unlike localized mechanical oscillations [37][38][39], the piezoelectric surface is much larger compared with the acoustic wavelength. Therefore, the phonons are itinerant on the material surface and in the form of propagating waves [31]. To control the quantized motions effectively, the SAW cavities are often combined with other systems, for example, with superconducting qubits or color centers, to form as hybrid quantum systems [40]. Analog to quantum controls with photons, many acoustic devices, such as circulators, switches and routers, are also needed for generating, controlling, and detecting SAW phonons in QAD experiment [10,35,[41][42][43][44][45][46][47]. However, it is still challenging to realize these nonreciprocal acoustic quantum devices in the artificial nano-and micro-scale SAW systems [27,48].By applying an external time periodic drive on a static system, the effective Hamiltonian of the whole system for the longtime evolution can be tailed freely, which allows one to observe topological band properties. This approach is referred as Floquet engineering [49][50][51], and has been exploited to simulate the topological toy models such as Haldane and Harper-Hofstadter lattices in artificial systems [21]. Inspired by these studies, we propose a novel method to realize synthetic magnetism in the phonon systems ...

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“…Novel non-reciprocal structure designs, like isolators and circulators, have been proposed recently due to their important roles in photonic and microwave circuits [50][51][52][53][54][55][56][57]. After the experimental demonstration of the Yjunction structure, we are in position to integrate different PTIs into another practical structure, namely a 4-port circulator.…”

Section: Topological 4-port Circulatormentioning

confidence: 99%

Topologically protected photonic modes in composite quantum Hall/quantum spin Hall waveguides

Xiao

et al. 2019

Phys. Rev. B

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Photonic topological systems, the electromagnetic analog of the topological materials in condensed matter physics, create many opportunities to design optical devices with novel properties. We present an experimental realization of the bi-anisotropic meta waveguide photonic system replicating both quantum Hall (QH) and quantum spin-Hall (QSH) topological insulating phases. With careful design, a composite QH-QSH photonic topological material is created and experimentally shown to support reflection-free edgemodes, a heterogeneous topological structure that is unprecedented in condensed matter physics. The effective spin degree of freedom of such topologically protected modes determines their unique pathways through these systems, free from backscattering and able to travel around sharp corners. As an example of their novel properties, we experimentally demonstrate reflection-less photonic devices including a 2-port isolator, a unique 3-port topological device, and a full 4-port circulator based on composite QH and QSH structures.

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Reconfigurable optomechanical circulator and directional amplifier

Cited by 189 publications

References 49 publications

Non‐Reciprocity in High‐Q Ferromagnetic Microspheres via Photonic Spin–Orbit Coupling

Non‐Reciprocity in High‐Q Ferromagnetic Microspheres via Photonic Spin–Orbit Coupling

Generating synthetic magnetism via Floquet engineering auxiliary qubits in phonon-cavity-based lattice

Topologically protected photonic modes in composite quantum Hall/quantum spin Hall waveguides

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