Enhancement of Kerr nonlinearity via spontaneously generated coherence in a four-level N-type atomic system

Jiang, Wenjuan; Yan, Xiao‐Qing; Shen, Jianping; Zheng, Huaibin; Wu, Chen; Yin, Bao-yin; Zhang, Yanpeng

doi:10.1016/j.optcom.2008.08.054

Cited by 40 publications

(14 citation statements)

References 34 publications

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“…Electromagnetically induced transparency also has many notable applications in quantum and nonlinear optics such as multiwave mixing [8][9][10], optical bistability [11,12], optical solitons [13][14][15][16][17], and Kerr nonlinearity [18]. Many proposals have been suggested both theoretically and experimentally for achieving enhanced Kerr nonlinearity accompanied by negligible absorption in three-and four-level atomic systems [19][20][21][22][23][24][25][26]. Wang et al [19] studied experimentally the enhanced Kerr nonlinear coefficient in a three-level -type atomic system for various powers of the coupling beam.…”

Section: Introductionmentioning

confidence: 99%

Phase-sensitive Kerr nonlinearity for closed-loop quantum systems

Hamedi

Juzeliūnas

2015

Phys. Rev. A

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The third-order susceptibility is investigated in a five-level atomic system in which the laser beams couple the ground state to a four-level closed-loop system. It is found that under the condition of the multiphoton resonance, one can enhance the Kerr nonlinearity of such a medium by properly adjusting the amplitudes and phases of the applied fields. In this case, the linear and nonlinear absorption reduce considerably in a region with a positive group velocity. It is demonstrated that the third-order susceptibility is very sensitive to the relative phase of the applied fields. An analytical model is presented to elucidate such phase control of the Kerr nonlinearity. A comparison is also made between the Kerr-nonlinear indices for the five-, four-, and three-level systems. It is realized that the magnitude of the Kerr nonlinearity for the five-level system is larger than that of the threeand four-level counterparts. Finally, it is shown that effect of Doppler broadening can lead to an enhanced Kerr nonlinearity while maintaining linear and nonlinear absorption.

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Section: Introductionmentioning

confidence: 99%

Phase-sensitive Kerr nonlinearity for closed-loop quantum systems

Hamedi

Juzeliūnas

2015

Phys. Rev. A

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“…Exotic optical phenomenon, e.g., self-phase modulation for the generation of optical solitons, and self-lensing of laser beams, offers application opportunities for quantum non-demolition measurements, quantum-bit regeneration, quantum-state teleportation, optical solitons, all-optical switching, etc., which are commonly realized through optical Kerr effects [2,3]. The improved Kerr nonlinearities along with reduced linear and nonlinear absorption characteristics provide new possibilities to control nonlinear interactions of optical systems for low light powers showing high sensitivities [4][5][6][7][8]. Such notable achievements have been the inspiration for the development of optical materials garnering the advantages of enhanced Kerr nonlinearities.…”

Section: Introductionmentioning

confidence: 99%

Hollow ZnO microspheres self-assembled from rod-like nanostructures: morphology-dependent linear and Kerr-type nonlinear optical properties

Haghighatzadeh

Mazinani

Ostad

et al. 2021

J Mater Sci: Mater Electron

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Hollow nanostructures have attracted attention because of their unique physiochemical properties and broad potential applications in electronics, optics and photonics. In this study, a facile hydrothermal approach was developed to fabricate hollow ZnO microspheres via self-assembled rod-like nanostructures. The morphology-controlled synthesis was conducted by altering hydrothermal treatment temperature (150, 200 and 250 °C) in solutions containing zinc acetate dihydrate precursor and glycerol as the stabilizing agent. The morphological observations indicated that hydrothermally grown ZnO architectures could be reasonably adjusted by modulating hydrothermal reaction temperature. Possible growth routes are proposed to elucidate the formation process of ZnO microspheres with the rod-like nanostructures. Morphology-dependent absorbance and emission along with red-shifts with improved crystalline qualities were observed with increasing hydrothermal growth temperature. Kerr-type nonlinear optical characteristics examined using single-beam Z-scan technique in the near infrared spectral range under nanosecond Nd-YVO4 laser pulses showed positive values of nonlinear refraction providing an evidence of self-focusing behaviors at the excitation wavelength of 1064 nm in all the samples studied. The highest Kerr-type nonlinear susceptibility was estimated to be 2.31 × 10–6 esu for hollow ZnO microspheres grown at 250 °C, suggesting synergistic effects of surface morphologies on optical nonlinearities.

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“…The vacuum induced coherence can be occurred in Λ [2], V [3] or ladder type [4] quantum systems. In the past two decades, the effect of the vacuum induced coherence on the optical properties of the quantum system has been studied and it was shown that the SGC can affect the optical phenomena such as pump-probe response [5], loss-free propagation of a short laser pulse [6], Autler-Townes doublet [7], optical bistability [8], spectral-line narrowing [9], Kerr nonlinearity [10,11], electromagnetically induced transparency (EIT), and refractive properties [12]. The role of quantum interference in the optical properties beyond two-photon resonance condition is investigated in a three-level V-type pumpprobe atomic system and it was demonstrated that the absorption, dispersion, group index, and optical bistability depend on the SGC [13].…”

Section: Introductionmentioning

confidence: 99%

Orbital angular momentum transfer via spontaneously generated coherence

et al. 2019

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We study the orbital angular momentum (OAM) transfer from a weak Laguerre-Gaussian (LG) field to a weak plane-wave in two closed-loop three-level V -type atomic systems. In the first scheme, the atomic system has two non-degenerate upper levels which the corresponding transition is excited by a microwave plane-wave. It is analytically shown that the microwave field induces an OAM transfer from an LG field to a generated third field. In the second scheme, we consider a three-level V -type atomic system with two near-degenerate excited states and study the effect *

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Enhancement of Kerr nonlinearity via spontaneously generated coherence in a four-level N-type atomic system

Cited by 40 publications

References 34 publications

Phase-sensitive Kerr nonlinearity for closed-loop quantum systems

Phase-sensitive Kerr nonlinearity for closed-loop quantum systems

Hollow ZnO microspheres self-assembled from rod-like nanostructures: morphology-dependent linear and Kerr-type nonlinear optical properties

Orbital angular momentum transfer via spontaneously generated coherence

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