Mechanical exceptional-point-induced transparency and slow light

Bao, Wang; Liu, Zeng-Xing; Kong, Cui; Xiong, Hao; Wu, Ying

doi:10.1364/oe.27.008069

Cited by 38 publications

(36 citation statements)

References 47 publications

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“…= γ e H z [18], therefore, the manipulation of roomtemperature slow light can be implemented by adjusting the external magnetic field instead of a strong coherent pump field. The group delay τ g of the transmitted probe field can be described by a gentle slope [37]- [39], i.e.,…”

Section: Resultsmentioning

confidence: 99%

Room-Temperature Slow Light in a Coupled Cavity Magnon-Photon System

Liu

Xiong

2019

IEEE Access

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Realizing room-temperature slow light is of fundamental importance in physics and may promote the practical applications of slow light in information storage and optical communication. Here, we propose a feasible way to realize room-temperature slow light based on magnon-polaritons in a coupled cavity magnon-photon system, in which the cavity microwave photons strongly coupling with the magnons in a small-scale magnetic insulator yttrium-iron-garnet (YIG, Y 3 Fe 5 O 12 ). We find that the generation of slow light does not require the harsh conditions of ultra-low temperature, and the magnitude of the group delay can be regulated by adjusting the external magnetic field. Furthermore, the transformation between the fast and slow light can be achieved by controlling the magnon-photon coupling strength. Based on the current experimental condition, we believe that the proposed scheme of room-temperature slow light will be highly accessible in experiments. The potential applications range from enhancing magnon-photon interaction to designing an optical communication network.INDEX TERMS YIG, magnon-polaritons, slow light, room temperature.The associate editor coordinating the review of this manuscript and approving it for publication was Wenjie Feng.

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Section: Resultsmentioning

confidence: 99%

Room-Temperature Slow Light in a Coupled Cavity Magnon-Photon System

Liu

Xiong

2019

IEEE Access

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“…These resonant dips represent different orders of axial modes supported in SNAP, respectively. As the transmission spectrum with the equidistant free spectral range (FSR) was demonstrated in the SNAP with parabolic ERV, the SNAP with parabolic is chosen in the following investigation [ 24 , 25 , 26 , 27 ]. Additionally, the coupling efficiency between the tapered fiber and the SNAP resonator is determined by the overlapping integral of their evanescent fields.…”

Section: Sensor Conceptmentioning

confidence: 99%

Simulation and Optimization of SNAP-Taper Coupling System in Displacement Sensing

Chen

Dong

Wang

et al. 2021

Sensors

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Sensing applications based on whispering gallery mode (WGM) microcavities have attracted extensive attention recently, especially in displacement sensing applications. However, the traditional displacement sensing scheme based on shift in a single resonance wavelength, has a lot of drawbacks. Herein, a novel displacement sensing scheme based on the surface nanoscale axial photonics (SNAP) is proposed to achieve a wide range and high-resolution displacement sensor through analyzing the transmittance of multiple axial modes. By analyzing the surface plot of the resonance spectrum with different coupling positions, the ideal coupling parameters and ERV for displacement sensing are obtained. In the following, displacement sensing with high sensitivity and a wide range is theoretically realized through adjusting the sensitivity threshold and the number of modes. Finally, we present our views on the current challenges and the future development of the displacement sensing based on an SNAP resonator. We believe that a comprehensive understanding on this sensing scheme would significantly contribute to the advancement of the SNAP resonator for a broad range of applications.

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“…The switchable electromagnetically induced transparency and absorption, as well as fast and slow light, have been proposed using dressed superconducting qubits [8], hybrid optomechanical system [24,25], dark-mode breaking [26][27][28], and so on. Particularly, there appears growing interest to control the EIT and EIABS by introducing exceptional points [29][30][31]. Photon stops [32,33], chiral EIT [34], and infinite slow light [33] have recently been realized around exceptional points.…”

Section: Introductionmentioning

confidence: 99%

Phase-Controlled Pathway Interferences and Switchable Fast-Slow Light in a Cavity-Magnon Polariton System

Jie

et al. 2021

Phys. Rev. Applied

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We study the phase-controlled transmission properties in a compound system consisting of a threedimensional copper cavity and an yttrium-iron-garnet (YIG) sphere. By tuning the relative phase of the magnon pumping and cavity-probe tones, constructive and destructive interferences occur periodically, which strongly modify both the cavity-field transmission spectra and the group delay of light. Moreover, the tunable amplitude ratio between pump-probe tones allows us to further improve the signal absorption or amplification, accompanied by either significantly enhanced optical advance or delay. Both the phase and amplitude ratio can be used to realize in situ tunable and switchable fast-slow light. The tunable phase and amplitude ratio lead to the zero reflection of the transmitted light and an abrupt fast-slow light transition. Our results confirm that direct magnon pumping through the coupling loops provides a versatile route to achieve controllable signal transmission, storage, and communication, which can be further expanded to the quantum regime, realizing coherent-state processing or quantum-limited precise measurements.

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Mechanical exceptional-point-induced transparency and slow light

Cited by 38 publications

References 47 publications

Room-Temperature Slow Light in a Coupled Cavity Magnon-Photon System

Room-Temperature Slow Light in a Coupled Cavity Magnon-Photon System

Simulation and Optimization of SNAP-Taper Coupling System in Displacement Sensing

Phase-Controlled Pathway Interferences and Switchable Fast-Slow Light in a Cavity-Magnon Polariton System

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