Controllable optical bistability in double quantum dot molecule

Yu, Chunlei; Sun, Lihui; Zhang, Huafeng; Chen, Fang

doi:10.1049/iet-opt.2018.0033

Cited by 9 publications

(3 citation statements)

References 34 publications

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“…A few years after, in 1976, Gibbs et al accomplished the first experimental observation of the OB phenomenon [2]. Since then, almost five decades later, the optical bistability is still an intensely investigated subject in different physical systems [3][4][5][6][7][8][9], primarily due to the fact it is closely related to other interesting optical phenomena such as the implementation of laser amplifiers [10], sensing elements [4], all-optical switches [11] and optical quantum memories [12].…”

Section: Introductionmentioning

confidence: 99%

Highly sensitive controllability of optical bistability in three-level atomic systems

Oliveira¹,

Borges²,

Souza³

et al. 2022

Preprint

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We theoretically investigate the optical bistability phenomenon in an ensemble of N noninteracting three-level atoms trapped inside an optical cavity. The atoms are in a Λ-level configuration, where one atomic transition is coupled by a cavity mode, while the other one is coupled by a classical field. In addition, we consider a pumping field driving the cavity mode. With this system, we are able to observe new kinds of hysteresis, while scanning either the frequency of the pumping field or the Rabi frequency (intensity) of the control field. We show that they can be highly controllable via external parameters of the system, achieving very narrow widths, thus being very useful for building new devices, such as small fluctuation detectors in either frequency or intensity of laser fields.

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Section: Introductionmentioning

confidence: 99%

Highly sensitive controllability of optical bistability in three-level atomic systems

Oliveira¹,

Borges²,

Souza³

et al. 2022

Preprint

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“…However, several application fields demand unidirectional SRL [8][9][10][11][12], which means a more longitudinal mode purity in the pre-established direction of propagation and a reduced sensitivity to the back-reflections. Notable examples include optoelectronic gyroscope which uses SRL as source and sensing element [9], high-speed modulation by exploiting unidirectional whistle-geometry SRL as injection-locked laser [10], tuneable orbital angular momenta (OAM) microring laser as light sources emitting helical beams [8,11] and high-repetition rate optical pulses by self-pulsing in unidirectional ring lasers [13].…”

Section: Introductionmentioning

confidence: 99%

Semiconductor racetrack resonator coupled to an S‐bent waveguide: Influence of the coupling coefficients on the unidirectional operation

Giannuzzi

Bardella

2021

IET Optoelectronics

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Semiconductor ring lasers have attracted remarkable interest as laser sources in photonic integrated circuits. They result in bidirectional laser owing to the rotation symmetry between the two counter-propagating modes of the ring cavity. This symmetry can be broken embedding an S-bend waveguide in the racetrack resonator, which generates an unbalanced loss mechanism and a non-reciprocal gain between clockwise and counterclockwise direction beams. The propagating field along the resonator in the undesirable direction is evanescently coupled to the S element in correspondence of two coupling regions and converted into the preferred one. The authors examined how the field coupling coefficients of the couplers impact the resonator unidirectionality. In numerical simulations, the authors changed the coupler gap distance and the coupler length of the directional couplers to scan the full range of variability of the coefficients. The simulated performances of the resonator are discussed in terms of the extinction ratio between the clockwise and the counterclockwise modes as well as the power truly circulated in the two directions of the resonator net of all losses. The finite-difference time-domain method within Synopsys RSoft © suite was used to simulate the evolution of the counterpropagating field along the racetrack. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…Quantum coherence in QDs molecules-that can be built up isolated or immersed into microcavities-has been accounted for and measured extensively [17,18,19,20,21,22,23,24]. A plethora of quantum effects due to quantum correlations in strongly coupled QDs allows the semi-conductor community to develop applications on quantum computing, quantum cryptography, optical bistability (non-linear response) [25,26], quantum teleportation, entanglement in QD molecules [27], and induced transparency [28].…”

Section: Introductionmentioning

confidence: 99%

Effective quasiparticle approach for a Cavity-QDots System

Gómez,

Cuartas,

Rey

et al. 2019

Preprint

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In this work, we present a quasiparticle strategy to study the Hamiltonian description of the stationary states for two quantum dots-cavity system. We consider three different effective schemes of quasiparticles that give an in-depth insight into the physics involved in the Hamiltonian eigenstates for parameters that optimize or minimize the energy gap condition. We analyze features of quantum measures like fractional composition, linear entropy, and concurrence to observe which one description gives the complete physical information. Our findings show that a polaritonic-lightmatter quasiparticle-approach catch better the physics contained in the whole regimes considered.

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Controllable optical bistability in double quantum dot molecule

Cited by 9 publications

References 34 publications

Highly sensitive controllability of optical bistability in three-level atomic systems

Highly sensitive controllability of optical bistability in three-level atomic systems

Semiconductor racetrack resonator coupled to an S‐bent waveguide: Influence of the coupling coefficients on the unidirectional operation

Effective quasiparticle approach for a Cavity-QDots System

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