Multiple transparency windows and Fano interferences induced by dipole-dipole couplings

Diniz, Emanuel Cardozo; Borges, H. S.; Villas-Bôas, C. J.

doi:10.1103/physreva.97.043848

Cited by 9 publications

(3 citation statements)

References 58 publications

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“…Such interference phenomena give rise to multiple Fano minima depending on the relative location of atoms in the chain. The manifestation of multiple Fano minima has been discussed in other contexts ( [60], [61]). The object of our study is to bring out interesting possibilities originating from the interference of quantum paths in relation to single-photon transport through a waveguide coupled to an atomic array.…”

Section: Introductionmentioning

confidence: 99%

Multiple Fano interferences due to waveguide-mediated phase coupling between atoms

Mukhopadhyay

Agarwal

2019

Phys. Rev. A

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We examine quantum interference effects due to absorption and emission from multiple atoms coupled to a waveguide and highlight the modifications they entail in regards to single-photon transport properties. A prominent upshot of these interference phenomena is the resonant suppression of the reflection amplitude, which leads to the observation of multiple Fano minima in the reflection spectrum. Such minima determine the points at which transparency is induced in the system. By taking recourse to the real-space Hamiltonian framework, we calculate analytically the reflectivity and transmissivity for a one-dimensional waveguide that evanescently couples to a chain of equally spaced quantum emitters. The inter-emitter spacing relative to the wavelength of the propagating photon, leading to a waveguide-mediated "phase-coupling" between the atoms, is found to fundamentally affect the existence of Fano minima. For a chain of N atoms, the number of minima can be at most N − 1. However, suitable choices of the phase can suppress the discernibility of the full range of roots in the reflection spectrum. A principal observation for the case of multiple emitters is the emergence of super-Gaussian characteristics close to zero-detuning and consequently, a plateau-shaped broadband spectrum in the region of high reflectivity. For a large chain size, the plateau gets transformed into a flat-topped quasi-rectangular profile in the frequency domain.

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Section: Introductionmentioning

confidence: 99%

Multiple Fano interferences due to waveguide-mediated phase coupling between atoms

Mukhopadhyay

Agarwal

2019

Phys. Rev. A

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“…N nearly degenerate mechanical mode couples dispersively to the intracavity field which allows N transparent windows to be obtained from the output field [47]. Furthermore, a two-level system (TLS) coupled to a one-dimensional array of N other TLSs with dipole-dipole coupling between the first neighbors can also achieve multiple transparent windows [48].…”

Section: Introductionmentioning

confidence: 99%

“…Inspired by multibody systems [28,[47][48][49][50] and mechanical mode coupling [36,51,52], in this paper we propose an array of optomechanical system that consist of an optical cavity with multiple nanomechanical resonators. We propose a path to produce multiple transparent windows, differing from the [28] in that the number of transparent windows depends on the number of nanomechanical resonators.…”

Section: Introductionmentioning

confidence: 99%

Multiple optomechanically induced transparency generated slow light in an array of optomechanical system

Xie,

Chen

2024

Phys. Scr.

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We present an array of optomechanical systems which consist of an optical cavity and three nanomechanical resonators. Introducing Jaynes-Cumming (J-C) coupling in the nearest neighbor resonator allows for the formation of optomechanical systems with arrays of N nanomechanical resonators. Using a strong pump field and a weak probe field to drive the optical cavity simultaneously, we investigated the coherent optical response and the probe transmission spectrum manifested as multiple optomechanically induced transparency. We illustrate the impact of probe-cavity detuning, J-C coupling strength, and the number of nanomechanical resonators on the transparent window. In particular, we analyze nanomechanical resonators and find that increasing their number results in multiple transparent windows and slow light at different frequencies. We also find that the slow light effect can be enhanced by increasing the number of nanomechanical resonators with odd numbers at resonance. These findings imply that the arrays of optomechanical system can be used for multichannel optical communications and multichannel quantum information processing.

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Probe response of a two-mode cavity with $$\chi^{\left( 2 \right)}$$ non-linearity, non-reciprocity and slow and fast light

Mukherjee

Jana

2021

Appl. Phys. B

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Multiple transparency windows and Fano interferences induced by dipole-dipole couplings

Cited by 9 publications

References 58 publications

Multiple Fano interferences due to waveguide-mediated phase coupling between atoms

Multiple Fano interferences due to waveguide-mediated phase coupling between atoms

Multiple optomechanically induced transparency generated slow light in an array of optomechanical system

Probe response of a two-mode cavity with $$\chi^{\left( 2 \right)}$$ non-linearity, non-reciprocity and slow and fast light

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