Four-Wave Mixing Dipole Soliton in Laser-Induced Atomic Gratings

Abstract

We demonstrate a novel type of stable multicomponent vector solitons consisting of two perpendicular four-wave mixing (FWM) dipole components induced by electromagnetically induced gratings. We analyze the formation and steering of the steady dipole solitons and their dynamical (energy transfer) effects. The dipole-mode solitons of two FWM processes have horizontal and vertical orientations, respectively. Omnidirectional Bragg reflections are also investigated.

Giant parabolic nonlinearities at infrared in Λ-type three level multiple quantum wells

“…The roles of EIT enhanced third order susceptibility (leading to Kerr nonlinearity) in determining the properties of optical solitons, four-wave mixing, all optical switching etc., in QW nanostructures as well as in atomic systems have been studied extensively [5,10,18,20]. On the other hand, though the co-existence of giant third and fifth order nonlinearities in the regime of EIT has been identified in atomic systems [24,25], identification of fifth (known as parabolic or quintic nonlinearity) or other higher order nonlinearities and their role on above nonlinear processes in QW structures have not received due attention.…”

“…In recent years electromagnetically induced transparency (EIT) and its related effects have been studied extensively both theoretically as well as experimentally in gases and semiconductor quantum wells [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Such keen interest is due to their potential applications covering enhancement of nonlinear optical processes [10], quantum coherent control [11], quantum information processing and transmission [11][12][13][14][15].…”

Phase-controlled optical switching and slow- and weak-light solitons in a coherent molecular system with permanent dipole moments

“…EIT is a very typical quantum interference phenomenon, which can be used to manipulate physical properties for both light and matter, including large reduction of group velocity [2,3] and giant enhancement of Kerr nonlinearity [4,5]. Based on these important features, EIT has been used to realize slow light, quantum memory [6,7], highly efficient four-wave mixing [8], high-precision measurement [9], quantum phase gates [10,11], weak-light ultraslow solitons [12][13][14][15], spatial solitons [16][17][18][19][20], and so on.…”

Discrete vortices on anisotropic lattices

“…The nonlinear propagation of an optical wave in a periodic system can lead to the formation of a variety of localized states [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Discrete vortices on twodimensional (2D) nonlinear lattices, which are localized states of an optical wave with an embedded nonzero phase circulation over a closed lattice contour, have attracted considerable attention over the past decade [19][20][21][22][23][24][25][26][27][28][29][30].…”