Enhanced Kerr Nonlinearity via Atomic Coherence in a Three-Level Atomic System

Wang, Hai; Goorskey, David; Xiao, Min

doi:10.1103/physrevlett.87.073601

Cited by 477 publications

(317 citation statements)

References 24 publications

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“…Wang et al performed a direct measurement of self-Kerr nonlinear coefficient in a three-level lambda EIT medium in the presence of Doppler broadening by using a cavity scanning technique. The measurement shows a great enhancement of the Kerr nonlinear index of refraction in several orders of magnitude around atomic resonance [12]. Recently, Doai et al [13] have developed an analytical model of EIT enhanced self-Kerr nonlinearity with controllable parameters of a light field and temperature of atomic sample which is in good agreement with the experimental observations [12].…”

Section: Introductionmentioning

confidence: 64%

Optical Bistability in a Controllable Giant Self-Kerr Nonlinear Gaseous Medium under Electromagnetically Induced Transparency and Doppler Broadening

Minh

Van

Xuan

et al. 2018

International Journal of Optics

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We study optical bistability (OB) in a controllable giant self-Kerr nonlinear atomic gaseous medium placed in a unidirectional ring cavity. The medium is coherently excited by strong controlling field and a weak probe laser field under electromagnetically induced transparency (EIT) and Doppler broadening. In a weak field limit of the probe light, an analytic OB equation for the probe light field is derived as an analytic function of parameters of the controlling field and temperature of the medium. It is shown that OB characters can be manipulated with the parameters due to the controllable properties of the self-Kerr nonlinearity. Furthermore, enhancement of the Kerr nonlinearity reduces the switching intensity threshold and width of the OB.

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Section: Introductionmentioning

confidence: 64%

Optical Bistability in a Controllable Giant Self-Kerr Nonlinear Gaseous Medium under Electromagnetically Induced Transparency and Doppler Broadening

Minh

Van

Xuan

et al. 2018

International Journal of Optics

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“…It has been shown, however, that when moving from a self-focusing to a self-defocusing regime the sign of the quadratic nonlinearity in the amplitude equation changes [25] with a corresponding change in the type of hexagonal pattern generated. A straightforward transfer from a self-focusing to a self-defocusing regime has been demonstrated experimentally in electromagnetically induced transparency schemes based on -type atomic systems [34,35], where a clear change in sign of the Kerr-nonlinear coefficient n 2 was observed when passing from negative detuning values, δ, to positive ones.…”

Section: A Self-focusing and Self-defocusing Regimesmentioning

confidence: 95%

Optical turbulence and transverse rogue waves in a cavity with triple-quantum-dot molecules

et al. 2017

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This version is available at https://strathprints.strath.ac.uk/61943/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output. We show that optical turbulence extreme events can exist in the transverse dynamics of a cavity containing molecules of triple quantum dots under conditions close to tunneling-induced transparency. These nanostructures, when coupled via tunneling, form a four-level configuration with tunable energy-level separations. We show that such a system exhibits multistability and bistability of Turing structures in instability domains with different critical wave vectors. By numerical simulation of the mean-field equation that describes the transverse dynamics of the system, we show that the simultaneous presence of two transverse solutions with opposite nonlinearities gives rise to a series of turbulent structures with the capability of generating two-dimensional rogue waves.

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“…Note that the instability of beam power P BS , which is necessary to provide the stabile position of E mean close to E 0 is ~ (E 2 -E 1 )/E 0 ~ 4*10 -8 , which is easy to realize. Now we need to determine the function ξ in (t) as well for computation of S in (f) and N in (f) by equations (13). But neither analytical expressions nor experimental data describing time variation of interferometer noise ξ in (t) is known.…”

Section: The Transmittance Of Nonlinear Fp Cavitymentioning

confidence: 99%

“…Substituting ξ in (t) in (23) we calculate time variation of interferometer output signal ∆E in (t), which is used in (13) to derive the spectrum S in (f) of interferometer output signal. Finally SNR in is computed from (14).…”

Section: Sinusoidal Gwmentioning

confidence: 99%

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Application of stochastic resonance in gravitational-wave interferometer

Karapetyan

2006

Phys. Rev. D

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We investigate novel approach, which improves the sensitivity of gravitational wave (GW) interferometer due to stochastic resonance (SR) phenomenon, performing in additional nonlinear cavity (NC). The NC is installed in the output of interferometer before photodetector, so that optical signal emerging interferometer incidents on the NC and passes through it. Under appropriate circumstances a specific transformation of noisy signal inside the NC takes place, which results in the increase of output signal-to-noise ratio (SNR). As a result optical noisy signal of interferometer becomes less noisy after passing through the NC. The improvement of SNR is especially effective in bistable NC for wideband (several hundreds Hz) detection, when chirp GW signal is detected. Then output SNR is increased up to ~ 0.5 and SNR gain reaches amounts ~ 10. When detection bandwidth is narrowed, the influence of SR mechanism gradually disappears, and SNR gain tends to 1. SNR gain also tends to 1 when the NC is gradually transformed to linear cavity. Proposed enhancement of SNR due to the SR is not dependent of noise type, which is prevalent in interferometer. Particularly proposed approach is the only one, which is capable to increase SNR at given amplitude of displacement noise. In present paper we study application of SR in GW interferometer for improving the sensitivity. PACSTo employ the SR phenomenon one needs to have nonlinear system, where noisy signal would be transformed and improved. Earlier in [9] we have considered this problem however, proposed configuration of interferometer was not suitable for experiments. In [9] we suggested to insert optical nonlinear medium in interferometer arm cavities, to change them to nonlinear cavities and to trigger the SR. But such scheme has the drawbacks: (i) because of high power circulating in arm cavities it would be difficult to maintain nonlinear medium in stable state (ii) it would be difficult to provide identical nonlinear parameters for two arm cavities. The scheme suffered also from the necessity to use a special white-light-cavity to relax tight requirements to laser frequency stability.Here we consider another, simpler configuration where an additional nonlinear cavity (NC) is installed in interferometer output before photodetector. A sketch of proposed configuration is shown in Fig. 1. The function of the NC is to improve SNR of passing through it noisy signal by the SR mechanism. This scheme is easy to realize in all existing ground based interferometers.We present in this paper the results of theoretical study of such interferometer. The main motivation of this work was to attract the attention of GW interferometery experts to the SR,

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Enhanced Kerr Nonlinearity via Atomic Coherence in a Three-Level Atomic System

Cited by 477 publications

References 24 publications

Optical Bistability in a Controllable Giant Self-Kerr Nonlinear Gaseous Medium under Electromagnetically Induced Transparency and Doppler Broadening

Optical Bistability in a Controllable Giant Self-Kerr Nonlinear Gaseous Medium under Electromagnetically Induced Transparency and Doppler Broadening

Optical turbulence and transverse rogue waves in a cavity with triple-quantum-dot molecules

Application of stochastic resonance in gravitational-wave interferometer

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