Steering, splitting, and cloning of an optical beam in a coherently driven Raman gain system

Verma, Onkar Nath; Dey, Tarak Nath

doi:10.1103/physreva.91.013820

Cited by 19 publications

(6 citation statements)

References 57 publications

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“…On the other hand, expulsive quadratic (anti-HO) potentials also appear in a variety of physically relevant setups [44]- [53]. In guided-wave optics, expulsive potentials occur in anti-waveguiding systems, which are used to design various data-processing photonic schemes [54]- [57]. The latter application makes it relevant to consider the propagation of optical solitons through a waveguide built of alternating trapping and expulsive segments [58].…”

Section: Introductionmentioning

confidence: 99%

Stability limits for modes held in alternating trapping-expulsive potentials

Luo

Liu

et al. 2022

Phys. Rev. E

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We elaborate a scheme of trapping-expulsion management (TEM), in the form of the quadratic potential periodically switching between confinement and expulsion, as a means of stabilization of two-dimensional dynamical states against the backdrop of the critical collapse driven by the cubic self-attraction with strength g. The TEM scheme may be implemented, as spatially or temporally periodic modulations, in optics or BEC, respectively. The consideration is carried out by dint of numerical simulations and variational approximation (VA). In terms of the VA, the dynamics amounts to a nonlinear Ermakov equation, which, in turn, is tantamount to a linear Mathieu equation. Stability boundaries are found as functions of g and parameters of the periodic modulation of the trapping potential. Below the usual collapse threshold, which is known, in the numerical form, as g < g (num) c ≈ 5.85 (in the standard notation), the stability is limited by the onset of the parametric resonance. This stability limit, including the setup with the self-repulsive sign of the cubic term (g < 0), is accurately predicted by the VA. At g > g, the collapse threshold is found with the help of full numerical simulations. The relative increase of gc above g (num) c is ≈ 1.5%, which is a meaningful result, even if its size is small, because the collapse threshold is a universal constant which is difficult to change.

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Section: Introductionmentioning

confidence: 99%

Stability limits for modes held in alternating trapping-expulsive potentials

Luo

Liu

et al. 2022

Phys. Rev. E

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“…Besides this, the deflection of light in terms of vector optical solitons (nonlinear polariton) in a double EIT system is proposed in [18]. Further, in comparison to EIT medium, active Raman gain medium (ARG) is shown to induce larger deflection of light beams [19] and antiwaveguiding [20].…”

Section: Introductionmentioning

confidence: 99%

Light deflection by light: Effect of incidence angle and inhomogeneity

Kumar

Dasgupta

2016

Phys. Rev. A

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We study the angular deflection of the circular polarized components of a linearly polarized probe field in a weakly birefringent atomic system in tripod configuration. A spatially inhomogeneous control field incident obliquely onto an atomic vapor cell facilitates a large angular divergence between circular components. We show that the angular resolution can be dynamically controlled by optimally choosing the angle of incidence and the transverse profile of the control beam. For instance, by employing a Laguerre-Gaussian profile of the control field, one can impart a large angular divergence to the circular components close to the entry face of the atomic vapor cell. We further demonstrate how such a medium causes the focusing and refocusing of the probe field, thereby acting as a lens with multiple foci. The absorption in the medium remains negligible at resonance due to electromagnetically induced transparency (EIT)

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“…Recently, light deflection in homogeneous medium subject to inhomogeneous external fields has attracted much attention [38][39][40]. It has potential applications in many fields such as steering, splitting, focusing, and cloaking of optical beam [41][42][43][44][45] due to the achievement in significant deflection angle. In order to investigate the light deflection phenomenon in a gaseous medium of orientated enantiopure chiral molecules, we begin with the master equations describing the dynamical evolution of the four-level model of left-or right-handed molecule, and then derive the chiralitydependent deflection trajectory in a medium of enantio-pure chiral molecules based on the steady-state optical response which can be determined by solving the master equations.…”

Section: Introductionmentioning

confidence: 99%

Enantio-discrimination via light deflection effect

Chen,

Ye,

Zhang

et al. 2019

Preprint

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We propose a theoretical method for enantio-discrimination based on the light deflection effect in four-level models of chiral molecules. This four-level model consists of a cyclic three-level subsystem coupled by three strong driving fields and an auxiliary level connected to the cyclic three-level subsystem by a weak probe field. It is shown that the induced refractive index for the weak probe field is chirality-dependent. Thus it will lead to chirality-dependent light deflection when the intensity of one of the three strong driving fields is spatially inhomogeneous. As a result, the deflection angle of the weak probe light can be utilized to detect the chirality of enantio-pure chiral molecules and enantiomeric excess of chiral mixture. Therefore, our method may have potential applications in biology and chemistry.

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Steering, splitting, and cloning of an optical beam in a coherently driven Raman gain system

Cited by 19 publications

References 57 publications

Stability limits for modes held in alternating trapping-expulsive potentials

Stability limits for modes held in alternating trapping-expulsive potentials

Light deflection by light: Effect of incidence angle and inhomogeneity

Enantio-discrimination via light deflection effect

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