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

We investigate numerically interactions between two in-phase or out-of-phase Airy beams and nonlinear accelerating in Kerr saturable media one transverse dimension. discuss different cases which the with intensities are launched into medium, but accelerate opposite directions. Since both possess infinite oscillating tails, we truncated beams, finite energies. During see solitons soliton pairs generated that not accelerating. In general, higher of interacting easier to form solitons; when...

Beams of ``squeezed'' light have important applications in quantum metrology and gravitational-wave detection. The authors generate twin beams correlated photons using parametrically amplified four- six-wave mixing a nonlinear optical crystal. This medium offers several advantages, such as better on-chip integration than atomic vapors, plus longer coherence time traditional materials. These achievements can also find potential application all-optical communication storage photonic circuits.

Topological defects, such as quantum vortices, determine the properties of fluids. Their study has been at center activity in solid state and BEC communities. In parallel, nontrivial behavior linear wave packets with complex phase patterns was investigated by singular optics. Here, we formation, evolution, interaction optical vortices Dirac point photonic graphene. We show that while their exact goes beyond equation requires a full account lattice properties, it can be still approximately...

We report the multi-Fano interference obtained through simultaneous acquisition of bright and dark states in different phase transitions Eu3+: BiPO4 (7:1, 6:1, 1:1, 0.5:1) NaYF4 (1:1/4) crystals. employ multi-dressed spontaneous four-wave mixing fluorescence (multi-order) to optimize strong photon-phonon nested dressing effect resulting more obvious interference. Firstly, is produced continuous multi-bound states. Secondly, five dips originate from dressings (one photon four phonons) under...

Narrow-band intensity-difference squeezing (IDS) beams have important applications in quantum metrology and gravitational wave detection. The best way to generate narrow-band IDS is employ a parametrically amplified (PA) four-wave mixing (FWM) process high-gain atomic media. Such can be further enhanced by cascading multiple PA FWM processes separate complicated experimental setup, added losses, mechanical stability limit the wide use of such scheme practical applications. Here we show that...

Akhmediev and Kuznetsov-Ma breathers are rogue wave solutions of the nonlinear Schr\"odinger equation (NLSE). Talbot effect (TE) is an image recurrence phenomenon in diffraction light waves. We report TE waves a cubic medium. It different from linear TE, that propagates NL medium eigenmode NLSE. Periodic impinging on exhibit recurrent behavior, but only at length half-TE with $\ensuremath{\pi}$-phase shift; fractional absent. The result interference lobes breathers. This interaction related...

Atomic media are important in optics research since they can be conveniently manipulated and controlled due to easy selection of atomic levels, laser fields, the active adjustment many system parameters. In this paper, we investigate optical Bloch oscillation, Zener tunneling, Bloch–Zener oscillation both theoretically numerically. We use two coupling fields prepare dynamical lattice through interference. To induce a transverse force, make frequency difference between increase linearly along...

The Klein paradox consists in the perfect tunneling of relativistic particles through high potential barriers. As a curious feature particle physics, it is responsible for exceptional conductive properties graphene. It was recently studied context atomic condensates and topological photonics phononics. While theory holds only normal incidence, so far angular dependence its strong variation with barrier height were not measured experimentally. In this work, we capitalize on versatility vapor...

We report non-Hermitian energy level alignment via photon–phonon dressing quantization. propose a spectral homogenizer based on four types of alignment, revealing that the reverse effect induces this alignment.

Abstract Hepatic steatosis significantly elevates the vulnerability of graft to ischemia-reperfusion (I/R) injury during liver transplantation (LT). We investigated protective role insulin-induced gene 2 (Insig2) in steatotic liver’s I/R and underlying mechanisms. Employing mouse model with Insig2 knock-out or hepatocyte-specific overexpression high-fat diets induce steatosis, we subjected these mice hepatic injury. The primary hepatocytes isolated from were used vitro hypoxia/reoxygenation...

We demonstrate Autler-Townes (AT) splitting of four-wave mixing in an electromagnetically induced transparency window, which results from the destructive interference between a three-photon process and five-photon process. The primary secondary AT splittings are achieved via atomic coherence four-level Y-type system. Theoretical calculations fit well with experimentally measured results. Such controlled multichannel nonlinear optical signals can have potential applications communication...

We report our observations of enhancement and suppression between two competing four-wave mixing (FWM) processes. The results show the evolution dressed effects (from pure into suppression) in degenerate FWM Moreover, due to induced atomic coherence system, there exist different interplays these processes via detuning parameters. In addition, power dependences are studied. Theoretical calculations carried out, which good agreement with experimental observations.

We investigate controllable spatial modulation of circular autofocusing Airy beams, under action different dynamic linear potentials, both theoretically and numerically.We introduce a novel treatment method in which the beam is represented as superposition narrow azimuthally-modulated one-dimensional beams that can be analytically treated.The potentials are appropriately designed, so effect either weakened or even eliminated when potential exerts "pulling" on beam, if "pushing" effect,...

We theoretically investigate the dually dressed electromagnetically induced transparency, and multidressed four-wave mixing (FWM) six-wave (SWM) processes in an inverted-$Y$-type atomic system with Zeeman sublevels. The results show that degeneracy of dark states can be lifted by dressing field as its intensity is increased. Moreover, derived analytical expressions indicate one can, for example, selectively create secondary on multi-Zeeman-sublevel (by tuning coupling field), distinguish two...

For the first time, we study parametric amplification process of multi-wave mixing (PA-MWM) signal and cascaded-nonlinearity (CNP) in sodium vapors both theoretically experimentally, based on a conventional phase-conjugate MWM self-diffraction four-wave (SD-FWM) processes, which are pumped by laser or amplified spontaneous emission (ASE), respectively. pumping case, SD-FWM serves as quantum linear amplifier (a CNP) out (inside) resonant absorption region. While for ASE only CNP occurs output...

Abstract With a forward cone emitting from the strong pump laser in thermal rubidium atomic vapor, we investigate non-degenerate parametrically amplified four-wave mixing (PA-FWM) process with dressing effects three-level “double-Λ” configuration both theoretically and experimentally. By seeding weak probe field into Stokes or anti-Stokes channel of FWM, gain processes are generated bright twin beams which called conjugate beams, respectively. However, effect beam will dramatically affect...

We report our experimental observations of spatial shift and splitting four-wave mixing (FWM) signal beams induced by additional dressing laser beams. These effects are caused the enhanced cross-Kerr nonlinearity due to atomic coherence in a two-level system. The separation number split FWM can both be controlled intensity beam, Kerr nonlinearity, density. Theoretical results agree quite well with observations. Studies such beam very useful understanding soliton formation interactions,...

We experimentally demonstrate the vortex solitons of four-wave mixing (FWM) in multi-level atomic media created by interference patterns with superposing three or more waves. The modulation effect is induced cross-Kerr nonlinear dispersion due to coherence system. These FWM are explained via three-, four- and five-wave topologies.

By creating lattice states with two-dimensional spatial periodic atomic coherence, we report an experimental demonstration of generating surface solitons a four-wave mixing signal in electromagnetically induced composed two gratings different orientations medium, each which can support one-dimensional soliton. The be well controlled by parameters, such as probe frequency, pump power, and beam incident angles, affected coherent defect states.

We study the realization of an optical transistor (switch and amplifier) router in multi-order fluorescence (FL) spontaneous parametric four-wave mixing (SP-FWM). estimate that switching speed is about 15 ns. The action results from Autler-Townes splitting spectral or time domain. switch amplifier are realized by dressing suppression enhancement FL SP-FWM. can be controlled multi-parameters (i.e., power, detuning, polarization).