In this paper, complex-variable sine-Gaussian cross-phase (CVSGCP) beams are proposed, and the transmission dynamics properties of CVSGCP in strongly nonlocal nonlinear media investigated. can produce a variety mode transformation characteristics during transmission. The roles parameters sine terms initial light field expression evolution intensity modes, phase, beam width analyzed detail, it is proved that effect cross phase to cause rotate. control different modes be achieved by selecting...

We proposed an approach for creating three-dimensional (3D) multifocal perfect vortices arrays by using a high numerical aperture objective. The position, orbital angular momentum states, number and diameter of the can be freely modulated special designed hybrid phase plate (HPP). HPP could calculated 3D shifting expression which is derived from Fourier transform theory Debye diffraction integral. Furthermore, we developed novel pixel checkerboard method adding information into HPP....

Optical vortices bearing orbital angular momentum (OAM) with fractional topological charge have many applications in particle guiding and transport, anisotropic edge enhancement, high-dimensional quantum entanglement, free-space optical communication. A vortex (FOV) breaks OAM orthogonality, though, making precise measurement complex difficult. This article shows how to measure the of a FOV by using two-dimensional multifocal array different integer charges. With an error detection below...

An air-core fiber imposed by torsion is investigated in this paper. We refer to kind of as twisted (TAF). It has been demonstrated that the eigenstates TAF consist guided optical vortex waves with different propagation constants a effective index. With increase twist rate, could separate OAM modes which are near degenerate or fiber. The separation conductive ultralong distance low crosstalk. be considered an ideal candidate for based communication. Moreover, we photonic crystal (TAPCF) can...

Orbital angular momentum (OAM) holographic technology has made advancements in the field of optical information encryption. In order to further enhance security capabilities and encryption quality, this paper proposes an technique based on a chiral vortex beam. Four keys are implemented, shared key is introduced by using multiplexing multichiral beam, which extends application range OAM A coding method discrete displacement phase modulation proposed, enabling pattern separation spatial...

Abstract Metasurface, spatiotemporal metasurface and tunable have attracted more attention in the fields of communication, polarization image terahertz detection. Numerous metasurfaces been proposed recently for generating a diverse array applications. However, many limited to single state switching function, which has severely hampered their development. In this paper, eight meta-atoms were designed by employing InSb, that dielectric constant could be modulated temperature. Consequently,...

Recently, chiral optical fields (COFs) have garnered significant attention due to their multiple controllable degrees of freedom (DOFs), enabling applications in diverse areas such as tweezers, manufacturing, and holographic encryption. However, existing schemes fail achieve precise control over certain aspects, particularly the fine‐tuning sidelobes, including overall shape structural characteristics, which limits practical applications. Herein, an approach fine sculpting COFs using a...

We proposed and experimentally demonstrated a novel method for generating chiral beam with controllable intensity twist lobes direction by using annular subzone (AS) vortex phase plates, which is composed of different ASs phases. The distribution continuity between two adjacent determines the light field. rotated optical filed determined topological charge sign. number gradient subzones. experimental results show that this effective practical, offers broad potential applications in particle...

Abstract Recently, orbital angular momentum (OAM) has been adopted to measure the shape of static objects and translation motion moving in optical remote sensing. Most these studies rely on measuring intensity variation OAM beams. However, does not change with rotation spinning object, but its phase changes. The is proved be proportional object’s velocity. Since a rotating object will cause dependent time, needs measured instantaneously, support OAM-based velocity measurement. In this work,...

A high numerical aperture multifocal metalens was proposed based on well-designed Pancharatnam-Berry phase optical elements. Both circularly and linearly polarized incident lights could be tightly focused into diffraction-limited focal spots. Right left spots realized simultaneously by illuminating a beam. The highest reached to 0.84 with full width at half-maximum of 263 nm. Moreover, we also presented whose elements are hybrid arranged the can realize spin-independent focusing 0.8. has...

We propose a highly efficient phase modulation method for generating an elliptic optical vortex with arbitrary controllable rotation angle, that can be recognized as degree of freedom. A transformation matrix and were used to realize the light field. numerically experimentally demonstrate control capability Bessel beam higher-order Laguerre–Gauss modes. The angle β, e multiplexing vortices could freely modulated by using proposed method. This work is important progress programmable tweezers,...

We present a simple method of spatial-division multiplexing/demultiplexing with orbital angular momentum (OAM) based on multi-ring optical fiber. Multi-ring fibers are ideal spatial division multiplexing carriers, providing more communication channels including orthogonal OAM and channels. propose an encoding scheme using perfect vortex array (MPVA) to make full use these achieve high-capacity data links. For improving the coupling efficiency, vortices whose radii independent topological...

In this paper, we proposed a flexible method for generating asymmetric chiro-optical fields. Different from most of the fields superimposed by vortex beams which are rotationally symmetric, field has locally controllable orbital angular momentum (OAM) and polarization state. By using helix phase plate (HPP) calculated based on coordinates transformation perfect vortex, OAM controllability single could be achieved. Then, matrix method, several discrete with different rotation angles...

Chiral optical beams that carry orbital angular momentum (OAM) have a broad range of applications such as tweezers, chiral microstructure fabrication, and communications. However, some inhomogeneous intensity distribution limits the application in these fields. In this Letter, two different types fields with uniform arbitrary length were proposed based on amplitude encoding method multifocal synthesis. The is determined by distance between focal points can greatly extend modulation field....

Based on the nonlocal nonlinear Schrödinger equation, pattern transformation and control of transverse cross-modulated sine-Gaussian (TCMSG) breathing solitons during transmission are studied. Several expressions have been derived, including transmission, soliton width, phase wavefront curvature, so on. The study demonstrates that coefficient cross modulation term controls TCMSG solitons. can form generalized spatial breathers transmission. variation width extrema their change rates with is...

Chiral optical fields caused by vortex beams possessing orbital angular momentum (OAM) can be used to fabricate helically structured materials and identify chiral molecules, in which the or molecules are associated with character of irradiated light. However, previously reported control only some parameters including number fringes, size, ellipticity, orientation, local intensity distribution, may hamper their applications. Thus, this work, we propose both theoretically experimentally an...

Long-distance transmitted orbital angular momentum (OAM) cannot be received completely by a single aperture receiver due to the divergence of OAM beams in free space, which results challenge for measuring and demultiplexing multi-OAM modes. We propose novel approach modes using synthetic partial receivers, could significantly reduce intensity crosstalk caused power leakage. The available long-distance free-space communication system are greatly increased, all can used multiplexing or...

In recent years, light's orbital angular momentum (OAM) has been used as a new degree of freedom in both classical and quantum communications. Fractional vortex (FV) with non-integer topological charge (TC) optical communication to increase transmission capacity improve security capability. However, it is difficult detect multiplexed FVs accurately, which restricts the application FV this work, we reported scheme TCs multiplexing integer OAM mode intervals. It started by raising an algorithm...

The refractive index is one of the essential parameters in describing biochemical reactions and biomedical diagnostics, situ measurement very important for micro total analysis system. We proposed an ultracompact biosensor based on a high numerical aperture metalens that was designed as two parts generating Pancharatnam-Berry phase propagation phase, respectively, by using zinc sulfide nanofins, nanopillars. Then incident light modulated into right-circularly polarized vortex beam...