The coding metasurface integrated with tunable materials offers an attractive alternative to manipulate the THz beam dynamically. In this work, we demonstrate a programmable based on liquid crystal. phase profile could be dynamically manipulated by switching “0” and “1” states of each element. deflect using designed sequence, maximum deflection angle 32° has been achieved. presented design opens route beamforming for communication.

In this study, we analyze how a backlight's peak wavelength, full-width at half-maximum (FWHM), and color filters affect the gamut of liquid crystal display (LCD) device establish theoretical limit, even if FWHM approaches 1 nm. To overcome propose new backlight system incorporating functional reflective polarizer patterned half-wave plate to decouple polarization states blue light green/red lights. As result, crosstalk between three primary colors is greatly suppressed, significantly...

Abstract Active planar optical devices that can dynamically manipulate light are highly sought after in modern optics and nanophotonics. The geometric phase derived from the photonic spin-orbit interaction provides an integrated strategy. Corresponding elements usually suffer static functions. Here, we introduce inhomogeneously self-organized anisotropic medium featured by photo-invertible chiral superstructure to realize with continuously tunable working spectrum light-flipped profile. Via...

Spatial light modulators (SLM), capable of dynamically and spatially manipulating electromagnetic waves, have reshaped modern life in projection display remote sensing. The progress SLM will expedite next-generation communication biomedical imaging the terahertz (THz) range. However, most current THz SLMs are adapted from optical alternatives that still need improvement terms uniformity, speed, bandwidth. Here, we designed, fabricated, characterized an 8 × based on tunable liquid crystal...

Abstract Vectorial optics with fine inhomogeneous polarization control are highly desired. Metasurfaces have been captivated a promising candidate, but their static post-fabrication geometry largely limits the dynamic tunability. Liquid crystal (LC) is usually employed as an additional index-changing layer together metasurfaces. Unfortunately, most of reported LCs only impart varying uniform phase on top that from metasurface, which we term “scalar” LC optics. Here, pixelate single-layer to...

Liquid-crystal fork gratings are demonstrated through photopatterning realized on a DMD-based microlithography system. This supplies new strategy for generating fast switchable, reconfigurable, wavelength-tolerant and polarization-insensitive optical vortices. The technique has great potential in broad fields such as OAM-based quantum computations, communications, micromanipulation.

We propose and implement a technique for arbitrary pattern fabrication in liquid crystal (LC) alignments local polarization control light wavefront. A micro-lithography system with digital micro-mirror device as dynamic mask forms micro-images on photoalignment layers further guides the LC molecule orientations. Besides normal phase gratings, more complex 2D patterns such quasicrystal checkerboard structures are demonstrated. To characterize optical performances of fabricated structures,...

Abstract Versatile devices, especially tunable ones, for terahertz imaging, sensing and high-speed communication, are in high demand. Liquid crystal based components perfect candidates the optical range; however, they encounter significant challenges band, particularly lack of highly transparent electrodes drawbacks induced by a thick cell. Here, strategy to overcome all these is proposed: Few-layer porous graphene employed as an electrode with transmittance more than 98%. A subwavelength...

Abstract Cholesteric liquid crystal (CLC) chiral superstructures exhibit unique features; that is, polychromatic and spin‐determined phase modulation. Here, a concept for digitalized is proposed, which further enables the arbitrary manipulation of reflective geometric may significantly upgrade existing optical apparatus. By encoding specifically designed binary pattern, an innovative CLC vortex (OV) processor demonstrated. Up to 25 different OVs are extracted with equal efficiency over...

Uniform and patterned orientation of a crystallographic direction ordered materials is fundamental significance great interest for electronic photonic applications. However, such control generally complicated challenging with regard to inorganic organic crystalline due the occurrence uncontrollable dislocations or defects. Achieving uniform lattice in frustrated liquid-crystalline phases, like cubic blue formidable task. Taming tailoring ordering soft, lattices along predetermined desired...

In this paper, few-layer porous graphene is integrated onto the surface of a metasurface layer to provide uniform static electric field efficiently control liquid crystal, thereby enabling flexible metamaterial designs. We demonstrate tunable cross-shaped absorber with different arm lengths driven by combined and electrode. The resulting supports resonant frequency from 0.75 1 THz high-quality factor, amplitude modulation ~80% at these frequencies an applied voltage 10 V. Furthermore,...

A high-efficiency technique for optical vortex (OV) generation is proposed and demonstrated. The based on liquid crystal fork gratings with space-variant azimuthal orientations, which are locally controlled via polarization-sensitive alignment layers. Thanks to the rewritability of agent dynamic image digital micro-mirror device, can be instantly arbitrarily reconfigured. Corresponding vortices carrying arbitrary radial indices demonstrated a conversion efficiency 98.5%, exhibiting features...

Arbitrary vector beams (VBs) are realized by the designed polarization converters and corresponding vector-photoaligned q-plates. The converter is a specific twisted nematic cell with one substrate homogeneously aligned other space-variantly aligned. By combining polarization-sensitive alignment agent dynamic micro-lithography system, various categories of liquid crystal demonstrated. Besides, traditional radially/azimuthally polarized light, high-order multi-ringed VBs, VB array different...

We develop a fluorinated phenyl-tolane based nematic mixture NJU-LDn-4 and evaluate its frequency-dependent birefringence utilizing terahertz time domain spectroscopy (THz-TDS). A large mean of 0.306 is obtained in broad range from 0.4 to 1.6 THz, with maximum 0.314 at THz. Furthermore, relation between molecular structures property discussed. This work reveals new insights for tailing liquid crystal molecules desirable THz range, which extremely meaningful the design fabrication fast,...

Overcoming chromatic aberrations is a vital concern in imaging systems order to facilitate full-color and hyperspectral imaging. By contrast, large dispersion holds opportunities for spectroscopy tomography. Combining both functions into single component will significantly enhance its versatility. A strategy proposed delicately integrate two lenses with static resonant phase switchable geometric separately. The former metasurface lens linear dispersion. latter composed of liquid crystals...

Abstract Optical beam shaping plays a key role in optics and photonics. In this work, meta-q-plate featured by arbitrarily space-variant optical axes is proposed demonstrated via liquid crystal photoalignment based on polarization-sensitive alignment agent dynamic micro-lithography system. Meta-q-plates with multiple-, azimuthally/radially variant topological charges initial azimuthal angles are fabricated. Accordingly, complex beams elliptical, asymmetrical, multi-ringed hurricane...

Geometric phases have attracted considerable attention in recent years, due to their capability of arbitrary beam shaping a most efficient and compact way, while traditional geometric are usually limited handling single-structured beams lack the parallel manipulation. Here, we propose digitalized phase enabling optical spin orbital angular momentum encoding. The concept is demonstrated inhomogeneous anisotropic media by imprinting particularly designed binary into space-variant phase. We...

Label-free, real-time, and in-situ measurement on cell apoptosis is highly desirable in biology. We propose here a design of terahertz (THz) metamaterial-based biosensor for meeting this requirement. This metamaterial consists planar array five concentric subwavelength gold ring resonators 10 μm-thick polyimide substrate, which can sense the change dielectric environment above metamaterial. employ sensor to an oral cancer (SCC4) with without cisplatin, chemotherapy drug treatment, find...

A terahertz (THz) q-plate is proposed and demonstrated to generate THz vortex beams. It composed of a large birefringence liquid crystal (LC) with spatially-varying director distribution sandwiched by two pieces fused silica glass. polarization-sensitive alignment agent photopatterned carry out the specific LC distribution. beams different topological charges are characterized digital holographic imaging system. The intensity phase distributions consistent theoretical analyses obtained....

Thiols are prone to react with a multitude of various functional groups in high yields, which has been widely used for surface- and particle-patterning, bioorganic synthesis, polymer modification, imprint nanolithography, the fabrication optical components, hydrogel curing hard protective coatings. In this work, chiral thiol helical twisting power was synthesized through novel synthetic route selectivity, yield, cost-effectiveness. It then fabricate liquid-crystal composite film ultra-wide...

Recently discovered reflective Pancharatnam-Berry phase (PB phase) from chiral anisotropic media (e.g., cholesteric liquid crystal, CLC) has aroused great interest in the emerging frontier of planar optics. However, single chirality common CLCs results intrinsic limitation same spin-selective PB manipulation, which means reversal input spin cannot realize conjugated phase. In this work, an innovative scheme based on opposite-chirality-coexisted superstructures is proposed to simultaneously...

Recent process in tackling Zn anode challenges is summarized, including designing structure, modifying electrolyte, optimizing separator and developing polymer electrolytes, which present a reference for constructing high-performance ZIBs.

Design and fabrication of freestanding chiro-photonic crystal film with the ability to change color over whole visible light spectrum is appealing for anticounterfeiting technology smart labels. Utilizing a newly synthesized light-responsive molecular motor functionalized cholesterol (chol-MM) on rotor, novel light-controlled photonic prepared by doping chol-MM into liquid crystals (LCs). Thanks crystalline substituent, can be triggered (420 nm). At same time, miscibility in LC matrix...