Observable effects of Kerr nonlinearity on slow light

Dey, Tarak Nath; Agarwal, G. S.

doi:10.1103/physreva.76.015802

Cited by 58 publications

(48 citation statements)

References 26 publications

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“…In this section, following perturbative calculations by Dey and Agarwal [29], we derive an analytical expression for the linear susceptibility of the medium at the steady state limit. We consider the probe to be very weak so that the density matrix can be expanded to first order in probe as…”

Section: B Medium Susceptibilitymentioning

confidence: 99%

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Kerr-field-induced tunable optical atomic waveguide

Sharma

Dey

2017

Phys. Rev. A

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We propose an efficient scheme for the generation of tunable optical waveguide based on atomic vapor in N -type configuration. We exploit both control field induced transparency and Kerr field induced absorption to produce a flexible probe transparency window otherwise not feasible. We employ a suitable spatial profile of control and Kerr beams to create a high contrast refractive index modulation that holds the key to guiding a weak narrow probe beam. Further we numerically demonstrate that high contrast tunable waveguide permits the propagation of different modes of probe beam to several Rayleigh lengths without diffraction. This efficient guiding of narrow optical beam may have important applications in large density image processing, and high resolution imaging.

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Section: B Medium Susceptibilitymentioning

confidence: 99%

“…Such interesting ideas have also been used in STED microscopy to image nano size particles [27,28]. A N -type four level system [29,30] can be used as an atomic analog for the mask. The atomic system becomes transparent to the weak probe due to presence of a strong control field.…”

Section: Introductionmentioning

confidence: 99%

Kerr-field-induced tunable optical atomic waveguide

Sharma

Dey

2017

Phys. Rev. A

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“…A particular example is the occurrence of an intensity dependent refractive index, with applications such as beam focussing, pulse compression, selfphase-or cross-phase modulation or optical switching [23,24,25,26,27,28,29,30]. Here, the connection to coherence properties is the following.…”

Section: Introductionmentioning

confidence: 99%

“…Laser driven atomic media are also known to exhibit significant nonlinear optical properties [10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear effects in pulse propagation through Doppler-broadened closed-loop atomic media

Fleischhaker

Evers

2008

Phys. Rev. A

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Nonlinear effects in pulse propagation through a medium consisting of four-level double-Λ-type systems are studied theoretically. We apply three continous-wave driving fields and a pulsed probe field such that they form a closed interaction loop. Due to the closed loop and the finite frequency width of the probe pulses the multiphoton resonance condition cannot be fulfilled, such that a time-dependent analysis is required. By identifying the different underlying physical processes we determine the parts of the solution relevant to calculate the linear and nonlinear response of the system. We find that the system can exhibit a strong intensity dependent refractive index with small absorption over a range of several natural linewidths. For a realistic example we include Doppler and pressure broadening and calculate the nonlinear selfphase modulation in a gas cell with Sodium vapor and Argon buffer gas. We find that a selfphase modulation of π is achieved after a propagation of few centimeters through the medium while the absorption in the corresponding spectral range is small.

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“…By making a transition between the two limiting cases, one can switch from the EIT regime to the absorption for the probe field propagation. Laser-driven atomic media, on the other hand, can be exploited to exhibit various nonlinear optical properties [15,16,18,20,24,26,28,31,[56][57][58]. A particular example is formation of optical solitons with applications for optical buffers, phase shifters [59], switches [60], routers, transmission lines [61], wavelength converters [62], optical gates [63] and others.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetically induced transparency and nonlinear pulse propagation in a combined tripod and Λ atom-light coupling scheme

Hamedi

Ruseckas

Juzeliūnas

2017

J. Phys. B: At. Mol. Opt. Phys.

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Abstract. We consider propagation of a probe pulse in an atomic medium characterized by a combined tripod and Lambda (Λ) atom-light coupling scheme. The scheme involves three atomic ground states coupled to two excited states by five light fields. It is demonstrated that dark states can be formed for such an atomlight coupling. This is essential for formation of the electromagnetically induced transparency (EIT) and slow light. In the limiting cases the scheme reduces to conventional Λ-or N -type atom-light couplings providing the EIT or absorption, respectively. Thus the atomic system can experience a transition from the EIT to the absorption by changing the amplitudes or phases of control lasers. Subsequently the scheme is employed to analyze the nonlinear pulse propagation using the coupled Maxwell-Bloch equations. It is shown that generation of stable slow light optical solitons is possible in such a five-level combined tripod and Λ atomic system.

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Observable effects of Kerr nonlinearity on slow light

Cited by 58 publications

References 26 publications

Kerr-field-induced tunable optical atomic waveguide

Kerr-field-induced tunable optical atomic waveguide

Nonlinear effects in pulse propagation through Doppler-broadened closed-loop atomic media

Electromagnetically induced transparency and nonlinear pulse propagation in a combined tripod and Λ atom-light coupling scheme

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