Real frequency splitting indirectly coupled anti-parity-time symmetric nanoparticle sensor

Li, Wenxiu; Zhang, Hao; Han, Peng; Chang, Xiaoyang; Jiang, Shuo; Zhou, Yang; Huang, Anping; Xiao, Zhisong

doi:10.1063/5.0020944

Cited by 20 publications

(4 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Later, in [ 86 ], an anti-PT-symmetric device was proposed for particle sensing. In [ 87 ], a spinning resonator (rotating around its centre) was proposed for reaching the EP in an anti-parity-time-symmetric system, realized with a single cavity, for ultrasensitive nanoparticle sensing (see Figure 15 b).…”

Section: Sensing Applications Of Non-hermitian Photonicsmentioning

confidence: 99%

Non-Hermitian Sensing in Photonics and Electronics: A Review

Carlo

Leonardis

Soref

et al. 2022

Sensors

View full text Add to dashboard Cite

Recently, non-Hermitian Hamiltonians have gained a lot of interest, especially in optics and electronics. In particular, the existence of real eigenvalues of non-Hermitian systems has opened a wide set of possibilities, especially, but not only, for sensing applications, exploiting the physics of exceptional points. In particular, the square root dependence of the eigenvalue splitting on different design parameters, exhibited by 2 × 2 non-Hermitian Hamiltonian matrices at the exceptional point, paved the way to the integration of high-performance sensors. The square root dependence of the eigenfrequencies on the design parameters is the reason for a theoretically infinite sensitivity in the proximity of the exceptional point. Recently, higher-order exceptional points have demonstrated the possibility of achieving the nth root dependence of the eigenfrequency splitting on perturbations. However, the exceptional sensitivity to external parameters is, at the same time, the major drawback of non-Hermitian configurations, leading to the high influence of noise. In this review, the basic principles of PT-symmetric and anti-PT-symmetric Hamiltonians will be shown, both in photonics and in electronics. The influence of noise on non-Hermitian configurations will be investigated and the newest solutions to overcome these problems will be illustrated. Finally, an overview of the newest outstanding results in sensing applications of non-Hermitian photonics and electronics will be provided.

show abstract

Section: Sensing Applications Of Non-hermitian Photonicsmentioning

confidence: 99%

Non-Hermitian Sensing in Photonics and Electronics: A Review

Carlo

Leonardis

Soref

et al. 2022

Sensors

View full text Add to dashboard Cite

show abstract

“…[14] When the system is subject to frequency perturbations, the system response manifests itself as frequency splitting. [15][16][17][18] The most representative is Vahala used an on-chip non-Hermitian Brillouin gyroscope to collect the Earth's rotation angular rate. The angular random walk reached 0.068 • h −1/2 , proving that a gyroscope working near an EP can achieve both volume and accuracy advantage.…”

Section: Introductionmentioning

confidence: 99%

Design of a high sensitivity and wide range angular rate sensor based on exceptional surface

Ding 丁,

Liu 刘,

Wang 王

et al. 2024

Chinese Phys. B

View full text Add to dashboard Cite

It is found that when the parity time symmetry phenomenon is introduced into the resonant optical gyro system and it works near the exceptional point, the sensitivity can be significantly amplified at low angular rate in theory. However, in fact, the exceptional point is easily disturbed by external environmental variables, which means that it depends on harsh experimental environment and strong control ability, so it is difficult to move towards practical application. Here, we propose a new angular rate sensor structure based on exceptional surface, which have the advantages of high sensitivity and high robustness. The system consists of two fiber-optic ring resonators and two optical loop mirrors, and one of resonators contains a variable ratio coupler and a variable optical attenuator. We theoretically analyzed the system response and the effects of phase and coupling ratio on the system response, respectively. Finally, compared with conventional resonant gyro, the sensitivity of this exceptional surface angular rate sensor can be improved by about 300 times at low speed. In addition, by changing the loss coefficient in the ring resonator, it can achieve a wide range of 600 rad/s. This scheme provides a new approach for the development of ultra-high sensitivity and wide range angular rate sensors in the future.

show abstract

“…Therefore, engineering EPs without a gain requirement has become a crucial key to better sensing. To overcome this limitation, anti-paritytime (APT) symmetry [22] and a synthetic magnetic field have been proposed to engineer EPs in passive systems. Different approaches to create an artificial magnetic field have been proposed for specific purposes, such as nonreciprocal and topological bosonic transport [23][24][25][26], heating-resistant ground-state cooling [27],…”

Section: Introductionmentioning

confidence: 99%

Sensor Sensitivity Based on Exceptional Points Engineered via Synthetic Magnetism

et al. 2023

View full text Add to dashboard Cite

An efficient mass sensor based on exceptional points (EPs), engineered under a synthetic magnetism requirement, is proposed. The benchmark system consists of an electromechanical (optomechanical) system where an electric (optical) field is driving two mechanical resonators that are mechanically coupled through a phase-dependent phonon hopping. This phase induces a series of EPs once it matches the condition of π/2(2n + 1). For any perturbation of the system, the phase-matched condition is no longer satisfied, and this lifts the EP degeneracies, leading to a frequency splitting that scales as the square root of the perturbation strength, resulting in a giant sensitivity-factor enhancement. Owing to the set of EPs, our proposal allows a multiple-sensing scheme and performs better than its anti-PT-symmetric sensor counterpart. This work sheds light on platforms that can be used for mass-sensing purposes, opening up new opportunities in nanoparticle or pollutant detection and in water treatment.

show abstract

Real frequency splitting indirectly coupled anti-parity-time symmetric nanoparticle sensor

Cited by 20 publications

References 23 publications

Non-Hermitian Sensing in Photonics and Electronics: A Review

Non-Hermitian Sensing in Photonics and Electronics: A Review

Design of a high sensitivity and wide range angular rate sensor based on exceptional surface

Sensor Sensitivity Based on Exceptional Points Engineered via Synthetic Magnetism

Contact Info

Product

Resources

About