Fluorescence microscopy with optical sectioning capabilities is extensively utilized in biological research to obtain three-dimensional structural images of volumetric samples. Tunable lenses have been applied for axial scanning acquire multiplane images. However, acquired by conventional tunable suffer from spherical aberration and distortions. Here, we design, fabricate, implement a dielectric Moiré metalens fluorescence imaging. The consists two complementary phase metasurfaces, variable...

Underwater optics in all-aquatic environments is vital for environmental management, biogeochemistry, phytoplankton ecology, benthic processes, global change, etc. Many optical techniques of observational systems underwater sensing, imaging, and applications have been developed. For the demands compact, miniaturized, portable, lightweight, low-energy consumption, a novel binocular depth-sensing imaging meta-optic device developed reported here. A GaN meta-lens specifically designed...

The increasing popularity of the metaverse has led to a growing interest and market size in spatial computing from both academia industry. Developing portable accurate imaging depth sensing systems is crucial for advancing next-generation virtual reality devices. This work demonstrates an intelligent, lightweight, compact edge-enhanced perception system that utilizes binocular meta-lens computing. miniaturized comprises meta-lens, 532 nm filter, CMOS sensor. For disparity computation, we...

We developed techniques for fabricating three-dimensional metallic microstructures using two-photon-induced metal-ion reduction. In this process, ions in a aqueous solution were directly reduced by tightly focused femtosecond pulsed laser to fabricate arbitrary structures. A self-standing microstructure with high electrical conductivity was demonstrated.

A laser fabrication technique for metal nanostructures is developed. Owing to the control of growth particles by surfactants, spatial resolution breaks classical limitation light. Three-dimensional silver are experimentally demonstrated (see image).

The lateral spatial resolution (LSR) in two-photon induced polymerization was improved to 80nm by using an anthracene derivative (9,10-bis-pentyloxy-2,7-bis[2-(4-dimethylamino-phenyl)-vinyl]anthracene (BPDPA)) as a highly sensitive and efficient photoinitiator. Photocurable resin containing 0.18mol% BPDPA exhibited low threshold of 0.64mW at 800nm. Theoretical calculations showed that the LSR can be increased reducing laser power, indicating could more initiators future.

Negative magnetic permeability of single split-ring resonators (SSRRs) is theoretically investigated in the visible light region. To describe conduction characteristics metal range, we develop internal impedance formula completely. In our calculations, determine responses SSRR accurately. Based on investigations, also demonstrate negative $\ensuremath{\mu}$ silver array

2D materials are expected to be favorable channel for field-effect transistor (FET) with extremely short length because of their superior immunity short-channel effects (SCE). Graphene, which is the most famous material, has no bandgap without additional techniques and this property major hindrance in reducing drain leakage. Therefore, finite band gap, such as transition metal dichalcogenides (TMDs, e.g. MoS2 WSe2) or phosphorene, required low power consumption FETs. Hafnium disulfide (HfS2)...

Opaque resins lacking adhesion and mechanical retention devices are required in positioning crowns; the average bond strength such cases is 60-70 kg/cm2. An adhesive opaque resin containing 4-methacryloxyethyl trimellitate anhydride was prepared for use with acrylic veneer crowns, its durability of an alloy were studied. Its bonding between cured dental nickel-chromium etched HCl oxidized HNO 3 250 kg/cm 2 after immersion water at 37°C 30 wk.

Metasurfaces are two-dimensional arrays of subwavelength optical antennas and have possible applications next-generation components such as ultrathin lenses, high-resolution holograms, cloaks. The remaining challenges in the field metasurfaces involve development methods to manufacture those tiny nanostructures on a large scale. There been many attempts overcome limitations electron beam lithography which is conventional method fabricate metasurfaces. This review provides discusses recent...

Object detection and depth perception are key foundations of object tracking machine navigation, facilitating a thorough understanding the surrounding environment. Currently, autonomous vehicles employ complex bulky systems with high cost energy consumption to achieve demanding multimodal vision. An imperative exists for development compact reliable technology enhance cost-effectiveness efficiency driving systems. Meta-lens, novel flat optical device, has an artificial nanoantenna array...

Abstract Endo‐microscopy is crucial for real‐time 3D visualization of internal tissues and subcellular structures. Conventional methods rely on axial movement optical components precise focus adjustment, limiting miniaturization complicating procedures. Meta‐device, composed artificial nanostructures, an emerging flat device that can freely manipulate the phase amplitude light. Here, intelligent fluorescence endo‐microscope developed based varifocal meta‐lens deep learning (DL). The...

The imaging properties of a scanning optical system that incorporates an axicon are presented. Beamshape characteristics including the axial distribution J(0) beam and its control aberration effects arising from off-axis illumination experimentally studied. These parameters relevant when is used in operating beam-scanning mode. pattern produced by blazed transmittance grating also

An experimental protocol for the realization of three-dimensional periodic metallic micro/nanostructures over large areas is presented. Simultaneous fabrication hundreds complex polymer structures achieved using a two-photon photopolymerization (TPP) technique combined with microlens array. Metallization performed through deposition thin and highly conductive films by electroless plating. A chemical modification photopolymerizable resin production hydrophobic coating on glass surface...

The reduction properties of silver ions in aqueous solution were improved with a two-photon sensitive dye. Excitation the dye through absorption process allowed low laser power to trigger ions, and sub-diffraction-limit fabrication was realized. An electrically conductive wire minimum width 400nm achieved. authors also demonstrated self-standing three-dimensional microstructures arbitrary shapes on glass substrate.

The emerging field of plasmonic metamaterials has introduced new degree freedom to manipulate optical from nano macroscopic scale, offering an attractive platform for sensing applications. So far, metamaterial sensor concepts, however, have focused on hot-spot engineering improve the near-field enhancement, rather than fully exploiting tailored material properties. Here, we present a novel spectroscopic technique based infrared (IR) absorber allowing low-background detection scheme as well...

A uniaxial-isotropic IR metamaterial consisting of fourfold-symmetric 3D split-ring resonators (SRRs) formed by a metal stress-driven self-folding method is fabricated and characterized. Unambiguous isotropic characteristics are demonstrated for any lateral rotation, polarization, incident angle up to 40°. The corresponding numerical simulations reveal that the interplay electric magnetic interactions SRR plays crucial role in bi-anisotropic responses. As service our authors readers, this...

Abstract In this study, we demonstrate a technique termed underwater persistent bubble assisted femtosecond laser ablation in liquids (UPB-fs-LAL) that can greatly expand the boundaries of surface micro/nanostructuring through because its capability to create concentric circular macrostructures with millimeter-scale tails on silicon substrates. Long-tailed are composed layered fan-shaped (central angles 45°–141°) hierarchical micro/nanostructures, which produced by beams refracted at mobile...

One of the most attractive potentials plasmonic metamaterials is amplification intrinsically weak signals such as molecular infrared absorption or Raman scattering for detection applications. This effect, however, only effective when target molecules are located at enhanced electromagnetic field structures (i.e., hot-spots). It thus significance to control spatial overlapping and hot-spots, yet it a long-standing challenge, since involves handling in nanoscale spaces. Here metamaterial...

Hybrid micro/nanostructures and light-absorbing pigment of melanin are two key factors for the excellent antireflective properties butterfly wings Ornithoptera goliath. In this work, femtosecond laser ablation metals in an organic solvent (FLAMOS) was used to generate hybird micro/nanostructured cross-linked ultrahigh/low spatial frequency laser-induced periodic surface structures (UHSFLs/LSFLs), which well mimic architecture The simultaneously deposited carbon or newly formed transition...

Broadband perfect absorbers in the visible region have attracted considerable attention many fields, especially solar thermophotovoltaic and energy harvesting systems. However, developing light with high absorptivity, thermal stability, a broad bandwidth remains great challenge. Here, we theoretically experimentally demonstrate that titanium nitride metasurface absorber exhibits broadband absorption an average of more than 92% over wavelength range 400 to 750 nm. The increase is attributed...