An analytical expression for the optical field of an Airy beam partially blocked by opaque obstacle is derived. The self-healing properties are studied and discussed in detail. study shows that process affected many factors such as size, propagation distance, wavelength, parameters beam. caused convergence energy from side to position finished when flow disappears. When distance short, main lobe obstruction located near lobe. long, can be far away result agrees with existing results explained caustic

An analytical expression of an Airy beam propagating in a strongly nonlocal nonlinear media is derived. The expressions the corresponding characteristic parameters for beam, such as centre gravity, effective size, curvature radius, kurtosis parameter, and linear momentum, have also been presented, respectively. normalized intensity distribution these are pictorially demonstrated media, It shows all versus axial propagation distance periodic. period momentum other periodic behavior has...

Abstract Analog spatial differentiator is an important optical computational device that can be potentially used in the field of high‐speed edge detection and image processing. In current stage, a general method still required to robustly design compact devices for various spectrum or complex situation. this work, dielectric metasurface proposed experimentally demonstrated build differentiators. This physically realized by high‐quality magnetic resonance mode hybridized with classic bounded...

The effect of Kerr nonlinearity on an Airy beam is investigated by using the nonlinear Schr\"odinger equation. Based moments method, evolution width in rms sense analytically described. Numerical simulations indicate that central parts major lobe initially give rise to radial compression during propagation a focusing medium, even though broadens. partial collapse center appear below threshold for global collapse. evolutions field distributions beams are different media while still travel...

Analytical propagation expression of an Airy beam in uniaxial crystals orthogonal to the optical axis is derived. The ballistic dynamics also investigated. propagating mainly depends on ratio extraordinary refractive index ordinary index. As example, positive demonstrated. acceleration transversal direction along more rapidly than that other direction. With increasing index, speeds up and slows down. follows a trajectory. effective size always larger

Abstract Harvesting biobased silane coupling agent to enhance the connection between fillers and epoxy matrix is vital achieve sustainable environmentally friendly products. In this work, a eugenol based silane‐coupling with high purity was prepared used for surface modification of nano‐sized silica particles. The structure composition physical properties modified nano‐SiO 2 were characterized through nuclear magnetic resonance, Fourier transferred infrared spectrometer, X‐ray photoelectron...

Here we study systematically the self-focusing dynamics and collapse of vortex Airy optical beams in a Kerr medium. The is suppressed compared to non-vortex beam medium due existence fields. locations depend sensitively on initial power, order, modulation parameters. may occur position where field nearly zero, while no appears region mainly distributed. Compared with beam, can at away from area distribution. Our shows possibility controlling manipulating collapse, especially precise by...

Optical beam steerers have been widely employed for information acquisitions. Numerous steering schemes developed, and each of them can satisfy practical requirements certain scenarios. However, there is still a lack comprehensive approach that able to balance all the critical technical parameters wide range applications. Here, semisolid micromechanical system based on micrometa-lens arrays (MMLAs) demonstrated. It operated by manipulating probe over two sets decentered MMLAs potentially...

The acousto-optic Raman-Nath (RN) diffraction effects of vector beams diffracted by the chiral ultrasonic grating are demonstrated experimentally and theoretically. deviation left- right-handed circularly polarized components in higher-order light leads to rearrangement their polarization states intensity due different refractive indices right-hand lights. When difference between for circular polarizations is small, linear with input localized linearly optical field rotate compared...

Abstract Evolution of polarization components with a high anisotropic scattering medium (HASM) has been an important and challenging topic due to its rich fundamental physics potential applications. In this work, vector transfer matrix (VTM) method is extended describe the linear-circular conversion two orthogonal in input beam HASM. We demonstrate theoretically experimentally for first time that manipulation compact generation multiple beams desired states through Desired different (left-...

Imaging technologies based on vector optical fields hold significant potential in the biomedical field, particularly for non-invasive scattering imaging of anisotropic biological tissues. However, dynamic and nature tissues poses severe challenges to propagation reconstruction due light scattering. To address this, we propose a deep learning-based polarization-resolved restoration method aimed at achieving efficient accurate from speckle patterns generated after passing through time-varying...

The goal of this study was to determine the effects hindlimb unloading (HU) on ex vivo growth and osteogenic potential mesenchymal stem cells (MSCs) from femurs rats. Microgravity simulated by 28-day HU in male Sprague–Dawley (SD) rats, bone marrow (BM) collected or control (CTL) MSCs were isolated BM cultured for eight passages. Then at passages 2, 4, 8 induced osteogenesis adipogenesis. results revealed that decreased also expression osteoblast gene marker mRNAs conditions. Meanwhile,...

Abstract The conversion between different polarizations generally requires an optical element or system. We demonstrate, theoretically and experimentally, that the states of polarization (SoP) can be flexibly manipulated in a structured field by itself. During propagation free space, any two orthogonal generated auto‐focus at desired positions purposely designing initial SoP distribution caustic phase cross‐section. experiment arrangement combines caustic‐based approach 4 f This provides way...

Metamaterials (MMs) have received wide attention due to their strong ability control wave propagation. Here we propose a thin MM that can realize broadband absorption, as well in-band phase-controlled reflection. It absorbs more than 90% energy of the incident circularly polarized (CP) light between 7.94-9.76 and 10.99-12.26 GHz and, meanwhile, works half-wave plate near 10.35 GHz. The schemes based on both natural artificial magnetic materials been discussed produce anisotropic phase. A...