Successive switching among four states in a gain-loss-assisted optical microcavity hosting exceptional points up to order four

Laha, Arnab; Beniwal, Dinesh; Ghosh, Somnath

doi:10.1103/physreva.103.023526

Cited by 10 publications

(4 citation statements)

References 61 publications

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“…Te gas sample can be detected by injecting the gas directly into microcavity [27]. Fourth, as long as there is a molecule attached to the microcavity, the response to the change in frequencies is obvious [28,29]. Optical microcavity has ultrahigh sensitivity which could reach nanoscale [30,31].…”

Section: Introductionmentioning

confidence: 99%

The Detection of Explosive Cyclotrimethylenetrinitramine (RDX) Using Optical Microcavity

Shen,

Wang,

Guo

et al. 2024

Quantum Engineering

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Optical microcavity, which is based on light-matter interaction, has the advantage of high sensitivity as a sensor. It has been widely used in the security, medicine, and environment fields these years. Detection of atoms and molecules at the nanoscale is one of the practical usages of optical microcavity. In this paper, we focus on a ultra-high-quality factor optical microcavity of whispering gallery mode (WGM) to detect the explosive of cyclotrimethylenetrinitramine (RDX). To demonstrate the high sensitivity of the method, we detect the solution at different concentrations. Different types of optical microcavities are suitable for the detection of different matters. Considering the effects of the results and the simplicity of operation, we use silica microspheres chiefly. This is the first time to detect the explosive using highly sensitive optical microcavity. The detection of pure explosives will be helpful for establishing the database of the explosives.

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Section: Introductionmentioning

confidence: 99%

The Detection of Explosive Cyclotrimethylenetrinitramine (RDX) Using Optical Microcavity

Shen,

Wang,

Guo

et al. 2024

Quantum Engineering

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“…More recently, much effort is put on studying the behavior of modes while encircling high-order or multiple EPs in a parameter space of multimode systems. Indeed, the presence of high-order or multiple low-order EPs in a system spectrum, along with the non-Hermitian breakdown of adiabaticity, can impose a substantial difficulty to manipulate the mode-switching behavior on demand 52 , 63 , 64 . That is, a system may end up only in a few states out of many regardless of the encircling direction and winding number.…”

Section: Introductionmentioning

confidence: 99%

Dynamically crossing diabolic points while encircling exceptional curves: A programmable symmetric-asymmetric multimode switch

et al. 2023

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Nontrivial spectral properties of non-Hermitian systems can lead to intriguing effects with no counterparts in Hermitian systems. For instance, in a two-mode photonic system, by dynamically winding around an exceptional point (EP) a controlled asymmetric-symmetric mode switching can be realized. That is, the system can either end up in one of its eigenstates, regardless of the initial eigenmode, or it can switch between the two states on demand, by simply controlling the winding direction. However, for multimode systems with higher-order EPs or multiple low-order EPs, the situation can be more involved, and the ability to control asymmetric-symmetric mode switching can be impeded, due to the breakdown of adiabaticity. Here we demonstrate that this difficulty can be overcome by winding around exceptional curves by additionally crossing diabolic points. We consider a four-mode $${{{{{{{\mathcal{PT}}}}}}}}$$ PT -symmetric bosonic system as a platform for experimental realization of such a multimode switch. Our work provides alternative routes for light manipulations in non-Hermitian photonic setups.

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“…Deformed microcavity lasers [1,2] have been widely studied up to now owing to the existence of models for investigating various physical phenomena, such as scar [3,4], tunneling [5,6], exceptional point [7,8], and ray-way correspondence [9,10]. They have also attracted considerable attention owing to their potential for optical applications [11].…”

Section: Introductionmentioning

confidence: 99%

Decomposed entropy and estimation of output power in deformed microcavity lasers

Park¹,

Kwon-Wook²,

Ju³

et al. 2022

Preprint

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Park et al. [Phys. Rev. A 106, L031504 (2022)] showed that the Shannon entropy of the probability distribution of a single random variable for far-field profiles (FFPs) in deformed microcavity lasers can efficiently measure the directionality of deformed microcavity lasers. In this study, we instead consider two random variables of FFPs with joint probability distributions and introduce the decomposed (Shannon) entropy for the peak intensities of directional emissions. This provides a new foundation such that the decomposed entropy can estimate the degree of the output power at given FFPs without any further information.

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Successive switching among four states in a gain-loss-assisted optical microcavity hosting exceptional points up to order four

Cited by 10 publications

References 61 publications

The Detection of Explosive Cyclotrimethylenetrinitramine (RDX) Using Optical Microcavity

The Detection of Explosive Cyclotrimethylenetrinitramine (RDX) Using Optical Microcavity

Dynamically crossing diabolic points while encircling exceptional curves: A programmable symmetric-asymmetric multimode switch

Decomposed entropy and estimation of output power in deformed microcavity lasers

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