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...

We investigate numerically the interactions of two in-phase and out-of-phase Airy beams nonlinear accelerating in Kerr saturable media, one transverse dimension. find that bound unbound soliton pairs, as well single solitons, can form such interactions. If interval between incident is large relative to width their first lobes, generated pairs just propagate individually do not interact. However, if comparable widths maximum interact display varied behavior. In case, they attract each other...

Since the quality of underwater classical optical imaging is constrained by absorptive and scattering nature for environment, it a challenging task to obtain long distance imaging. Ghost second-order correlation method using co-incidence measurement, which has advantages disturbance-free wider angle view (AOV), can effectively improve result. We have investigated computational ghost under conditions different turbidities from angles. The reconstruction obtained be rather desirable, in...

We study three (nested, parallel, and sequential cascade) types of schemes for doubly dressed four-wave-mixing processes in an open five-level atomic system. The interaction between two dressing fields the nested-cascade scheme is strongest weakest parallel-cascade scheme, with intermediate them. Mutual-dressing constructive or destructive interference coexisting multiwave mixing channels such a system are also considered. Investigations these multidressing mechanisms interactions very...

The feasibility of realizing a photonic Floquet topological insulator (PFTI) in an atomic ensemble is demonstrated. interference three coupling fields will split energy levels periodically, to form periodic refractive index structure with honeycomb profile that can be adjusted by different frequency detunings and intensities the fields. This turn affect appearance Dirac cones momentum space. When lattice sites are helically ordered along propagation direction, gaps open at points, one...

We experimentally investigate the two-dimensional condensate (optical dropletlike) soliton formation and dynamics of generated signal probe beams in four-wave mixing (FWM) process with atomic coherence, under competition between third- fifth-order nonlinear susceptibilities. With such competing nonlinearities, mutual transformations among dropletlike fundamental, dipole, azimuthally modulated vortex FWM solitons are observed. The influence on photonic band gap is also investigated. All...

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...

Single-pixel imaging is suitable for low light level scenarios because a bucket detector employed to maximally collect the from an object. However, one of challenges its slow speed, mainly due modulation technique. We here demonstrate 1.4MHz video based on computational ghost with RGB LED array having full-range frame rate up 100MHz. With this method, motion high speed propeller observed. Moreover, by exploiting single-photon detectors increase detection efficiency, method developed...

Present study reports a novel visible-light transparent, microwave broadband absorbing metamaterial. The designed structure is implemented using three different sizes of indium tin oxide (ITO) conductive film patch arrays, which capable achieving reflection coefficient ≤ -10 dB from 2.2 to 18 GHz in simulations. Moreover, fractional bandwidth about 156.4% and the absorber thickness only 0.088 times cutoff wavelength (the lowest absorption frequency) was achieved. Changing angle incidence...

With the growing global energy demand and environmental issues, saving technologies are becoming increasingly important in building sector. Conventional windows lack thermal insulation capabilities, while Low emissivity glass (Low-e glass) attenuates mobile communication signals reflecting infrared. Therefore, this paper aims to design a type of for "Sub 6GHz" frequency band 5G. These combine inherent transparency traditional with properties Low-e glass, also ensuring optimal performance...

Abstract The combination of tunable and static absorption at different frequency bands is urgently desired for radar stealth technology yet still remains a challenge. This study proposes novel strategy establishing window in wideband absorber. A structural prototype designed with layer, resistive reflection backplane. By applying biasing voltage to the absorber can be dynamically controlled 2–6 GHz. After integration consistently stabilizes 6–18 measured spectra three planar specimens align...

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.

A novel and simple superbunching pseudothermal light source is introduced based on common instruments such as laser, lens, pinhole groundglass. $g^{(2)}(0)=3.66 \pm 0.02$ observed in the suggested scheme by employing two rotating Quantum classical theories are employed to interpret effect. It predicted that $g^{(2)}(0)$ can reach $2^N$ if $N$ groundglass were employed. These results helpful understand physics of superbunching. The proposed may serve a new type study second- higher-order...

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...

Deep-learning (DL) methods have gained significant attention in ghost imaging (GI) as promising approaches to attain high-quality reconstructions with limited sampling rates. However, existing DL-based GI primarily emphasize pixel-level loss and one-to-one mapping from bucket signals or low-quality images images, tending overlook the diversity image reconstruction. Interpreting reconstruction perspective of conditional probability, we propose utilization denoising diffusion probabilistic...

Optical phased arrays (OPAs) encounter a formidable trade-off between performance and design due to the intricacies of their system. Here, we propose cascaded domain engineering OPA structure via engineering. A six-layer prototype, consisting 32 array elements, was designed, fabricated, characterized. In contrast existing scheme, only one control electronics is used entire regardless number elements. The speed beam steering demonstrated up 3 MHz in bulk LiNbO3 (LN) demo, based on fast...

Chlorosis is a crucial factor affecting the normal growth of rice seedlings. Light intensity can significantly control chlorosis, but uncertainty about key factors chlorosis caused by light still exists. The purpose this work to determine what causes affect chlorosis. Xiangzaoxian 24 was used as test material investigate effects on seedlings setting five treatments, T1 (50 μmol m–2 s–1), T2 (100 T3 (250 T4 (500 and T5 (750 s–1). In study, chlorophyll content, ascorbic acid (AsA) related gene...

The ability to capture and record high-resolution images over long distances is essential for a wide range of applications, including connected autonomous vehicles, defense security operations, as well agriculture mining industries. Here, we demonstrate self-assembled bistatic long-range imaging LiDAR system. Importantly, achieve high signal-to-noise ratio (SNR) data, employed comprehensive suite denoising methods temporal, spatial, spectral, polarization filtering. With the aid these...