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Physical Review A

Nonreciprocal photonic transistor with a spinning polaritonic microcavity

Zi-Fa Yu, Pengfei Yan, Ji-Ming Gao, Fang-Qi Hu, Zhengmei Zhang, Aixia Zhang, Ju-Kui Xue

Published Jan 15, 2025• 5 citations
Publisher

Abstract

We propose a theoretical scheme to achieve a nonreciprocal polaritonic photonic transistor by using a spinning microresonator coupled to a tapered fiber. In such a nonreciprocal device, owing to the combination of Sagnac effects and Stokes or anti-Stokes scattering, the transmission of probe light in clockwise and counterclockwise directions exhibits clockwise (counterclockwise) unidirectional amplification, bidirectional amplification, and bidirectional attenuation, simultaneously accompanied by unidirectional slow-fast light, bidirectional fast light, and bidirectional slow light, which can be effectively modulated by pump fields and couplings among excitons, photons, and phonons. In particular, we also discover perfect unidirectional transmission, i.e., the transmission in the opposite direction is completely blocked, and fast-slow light switching by appropriately regulating pump fields, which is optimal for signal isolation and controllable group advance-delay switching. Therefore, our proposed nonreciprocal photonic transistor is an excellent multifunctional device with various amplification-attenuation transmission and fast-slow light nonreciprocities. Our results provide an opportunity to engineer multifunctional nonreciprocal photonic devices, which may be useful for building integrated photonic circuits, chiral quantum technologies, and quantum communication networks.

DOI
10.1103/physreva.111.013517

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We propose a theoretical scheme to achieve a nonreciprocal polaritonic photonic transistor by using a spinning microresonator coupled to a tapered fiber. In such a nonreciprocal device, owing to the combination of Sagnac effects and Stokes or anti-Stokes scattering, the transmission of probe light in clockwise and counterclockwise directions exhibits clockwise (counterclockwise) unidirectional amplification, bidirectional amplification, and bidirectional attenuation, simultaneously accompanied by unidirectional slow-fast light, bidirectional fast light, and bidirectional slow light, which can be effectively modulated by pump fields and couplings among excitons, photons, and phonons. In particular, we also discover perfect unidirectional transmission, i.e., the transmission in the opposite direction is completely blocked, and fast-slow light switching by appropriately regulating pump fields, which is optimal for signal isolation and controllable group advance-delay switching. Therefore, our proposed nonreciprocal photonic transistor is an excellent multifunctional device with various amplification-attenuation transmission and fast-slow light nonreciprocities. Our results provide an opportunity to engineer multifunctional nonreciprocal photonic devices, which may be useful for building integrated photonic circuits, chiral quantum technologies, and quantum communication networks.
Abstract We theoretically provide a scheme for realizing a photonic negative differential transistor (NDT) by using a two-port asymmetric system with cavity exciton polaritons. In such a hybrid optomechanical system, the transmission of the probe light can be completely regulated by the pump field. Interestingly, the resonance transmission curve of probe light has a negative (positive) slope to the pump intensity, which depends on the coupling among excitons, photons and phonons. Therefore, the probe transmission exhibits the characteristic of negative (positive) differential transistors. The transmission spectrum of probe fields is modified by Stokes and anti-Stokes scattering effects, resulting in the output probe light be either attenuated or amplified. Moreover, we find that the transmission of pump fields has a bistability characteristic with appropriate parameters due to nonlinear effects. Our results open up exciting new possibilities for designing a photonic NDT, which may be applied to implement polariton integrated circuits.
we investigate the transmission of probe laser beam in a coupled-cavity system with polaritons by using standard input-output relation of optical fields, and proposed a theoretical schema for realizing a polariton-based photonic transistor. On account of effects of exciton-photon coupling and single-photon optomechanical coupling, a probe laser field can be either amplified or attenuated by another pump laser field when it passes through a coupled-cavity system with polaritons. The Stokes and anti-Stokes scattered effect of output prober laser can also be modulated. Our results open up exciting possibilities for designing photonic transistors.
We propose to achieve a multicolor nonreciprocal optical amplifier, a crucial device in optical communication and information processing, by spinning an active resonator. We show that in such a device, due to the interplay of the Sagnac effect and the optical gain, nonreciprocal signal amplification can be realized, accompanied by a giant enhancement of optical group delay from 0.3ms0.3\phantom{\rule{0.28em}{0ex}}\mathrm{ms}0.3ms to 35ms35\phantom{\rule{0.28em}{0ex}}\mathrm{ms}35ms in a chosen direction, which is otherwise unattainable in a passive device. Also, coherent amplification of higher-order optical sidebands and a slow-to-fast light switch can be achieved by tuning both the pump power and the spinning velocity. Our work provides a unique and accessible way, well compatible with other existing techniques, to realize multicolor nonreciprocal optical amplifiers for more flexible control of optical fields.
We propose a theoretical method to realize nonreciprocal light transmission in an optomechanical device assisted by directional quantum squeezing. Specifically, we consider the device consisting of an optomechanical resonator and a nonlinear optical resonator with directional pumping. We find that optical squeezing occurs along the pump direction when the nonlinear resonator is directionally pumped, enabling nonreciprocal light transmission as well as nonreciprocal group delay (slow light) or advancement (fast light). Furthermore, we find that the efficiency of the second-order sidebands can be enhanced in one direction compared with the opposite direction. Our work provides a promising design for the application of directionally squeezed optomechanical devices in nonreciprocal optical communication and signal processing.
We propose a scheme for implementing nonreciprocal transmission and a nonreciprocal photon blockade (PB) in a whispering-gallery-mode optomechanical resonator. By decoupling the mechanical degree of freedom under the Born-Oppenheimer approximation, the system is reduced to one incorporating Kerr-type nonlinearities induced by optomechanical coupling, including self-Kerr nonlinearities of the clockwise (CW) and counterclockwise (CCW) modes and cross-Kerr nonlinearity between these two modes, thereby strong nonreciprocal PB and transmission can be implemented. We demonstrate that the nonreciprocal PB and transmission are sensitive to the relative phase $\ensuremath{\theta}$ between CW and CCW modes, allowing for switching between reciprocity and nonreciprocity of PB and transmission through engineering the relative phase of external driving lasers. Numerical results obtained with experimental parameters validate the feasibility of achieving perfect nonreciprocal PB and transmission. Our paper presents a viable mechanism for the implementation of perfect nonreciprocal PB and transmission, along with a versatile approach of phase modulation, which holds great promise in serving as a chiral single-photon source in unidirectional quantum communications based on quantum nonreciprocal devices.
We study how to achieve, manipulate, and switch classical or quantum nonreciprocal effects of light with a spinning Kerr resonator. In particular, we show that even when there is no classical nonreciprocity (i.e., with the same mean number of photons for both clockwise and counterclockwise propagating modes), it is still possible to realize nonreciprocity of quantum correlations of photons in such a device. Also, by tuning the angular velocity and the optical backscattering strength, higher-order quantum nonreciprocity can appear, featuring qualitatively different third-order optical correlations, even in the absence of any nonreciprocity for both the mean photon number and its second-order correlations. The possibility to switch a single device between a classical isolator and a purely quantum directional system can provide more functions for nonreciprocal materials and new opportunities to realize novel quantum effects and applications, such as nonreciprocal multi-photon blockade, one-way photon bundles, and backaction-immune quantum communications.