A5082173638- Metamaterials and Metasurfaces Applications
- Advanced Antenna and Metasurface Technologies
- Gyrotron and Vacuum Electronics Research
- Plasmonic and Surface Plasmon Research
- Orbital Angular Momentum in Optics
- Particle accelerators and beam dynamics
- Photonic Crystals and Applications
- Near-Field Optical Microscopy
- Particle Accelerators and Free-Electron Lasers
- Optical Coatings and Gratings
- Photoacoustic and Ultrasonic Imaging
- Thermography and Photoacoustic Techniques
- Integrated Circuits and Semiconductor Failure Analysis
- Non-Destructive Testing Techniques
- Advanced Memory and Neural Computing
- Advanced Optical Imaging Technologies
- Laser Material Processing Techniques
- Radiative Heat Transfer Studies
- Advanced Fluorescence Microscopy Techniques
- Underwater Acoustics Research
- Radiation Effects and Dosimetry
- Pulsed Power Technology Applications
- Optical Polarization and Ellipsometry
- Enterobacteriaceae and Cronobacter Research
- Nuclear materials and radiation effects
Pohang University of Science and Technology
2003-2025
Pohang Iron and Steel (South Korea)
2022
Kyungpook National University
2019-2021
Dongyang Mirae University
2003
Osaka Prefecture University
1989
Structured light (SL)-based depth-sensing technology illuminates the objects with an array of dots, and backscattered is monitored to extract three-dimensional information. Conventionally, diffractive optical elements have been used form laser dot array, however, field-of-view (FOV) diffraction efficiency are limited due their micron-scale pixel size. Here, we propose a metasurface-enhanced SL-based platform that scatters high-density ~10 K over 180° FOV by manipulating at...
Abstract Metalenses have revolutionized optical technologies with their superior ability to manipulate light and the potential replace conventional, bulky components. However, commercialization is hindered by limitations in conventional manufacturing techniques, such as small patterning areas, low throughput, high cost. In this study, two methods are introduced for scalable wafer‐scale of metalenses operating near‐infrared region, aimed at overcoming abovementioned challenges. The first type...
Abstract Structural coloration using metasurfaces has been steadily researched to overcome the limitations of conventional color printing pigments by improving resolution, lowering toxicity, and increasing durability. Many have demonstrated for dynamic structural convert images at visible spectrum. However, previous works cannot reach near-zero scattering when colors are turned-off, preventing it from being cryptographic applications. Herein, we propose a completely on/off switchable with...
Metalenses comprised of artificial subwavelength structures known as meta-atoms have demonstrated abilities beyond conventional bulky optical components by modulating the phase, amplitude, and polarization light in an ultrathin planar form factor. In this Tutorial, we present fundamental principles practical design procedures to exploit metalenses, including achromaticity, high numerical aperture, tunability. The include both plasmonic dielectric meta-atoms, which require different physics...
Abstract Metalenses are instruments that manipulate waves and have exhibited remarkable capabilities to date. However, an important hurdle arises due the severe hampering of angular response originating from coma field curvature aberrations, which result in a loss focusing ability. Herein, we provide blueprint by introducing notion wide field-of-hearing (FOH) metalens, designed particularly for capturing sound with decreased aberrations. Employing aberration-free planar-thin metalens...
We theoretically and experimentally demonstrate an RGB achromatic metalens that operates concurrently at three visible wavelengths ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="m1"> <mml:mrow> <mml:mi>λ</mml:mi> <mml:mo>=</mml:mo> <mml:mn>450</mml:mn> </mml:mrow> </mml:math> , 532, 700 nm) with a high numerical aperture of 0.87. The is designed by simple integration components the spatial interleaving method. simulated shows operation focusing efficiencies...
Abstract The field of high-bandwidth holography has been extensively studied over the past decade. Orbital angular momentum (OAM) holography, which utilizes vortex beams with theoretically unbounded OAM modes as information carriers, showcases large capacitance hologram storage. However, limited to a single wavelength, restricting its potential for full-color and displays. In this study, we propose wavelength multiplexed that multiple dimensions light—wavelength OAM—to provide multi-color...
Recent advances in metasurface lenses (metalenses) have shown great potential for opening a new era compact imaging, photography, light detection, and ranging (LiDAR) virtual reality/augmented reality applications. However, the fundamental trade-off between broadband focusing efficiency operating bandwidth limits performance of metalenses, resulting chromatic aberration, angular relatively low efficiency. A deep-learning-based image restoration framework is proposed to overcome these...
Abstract Optical‐resolution photoacoustic microscopy (OR‐PAM) enables both high‐resolution and high‐contrast imaging of optical chromophores ranging from biological tissues to inorganic samples. The lateral spatial resolution OR‐PAM depends on its configuration is primarily determined by the numerical aperture objective lens. This study demonstrates a novel, lens‐free, shear‐force system using tapered fiber, serving as proof‐of‐concept toward implementation super‐resolution, near‐field...
Interactions between structured optical fields (SOFs) and meta-atoms have been intensively studied, stimulated by recent advancements on the generation of SOFs synthesis exotic meta-atoms. Multipole expansion is an efficient accurate theoretical framework for studying such problems. In this work, explicit expressions their beam-shape coefficients are provided, properties also briefly discussed; considered include Laguerre-Gaussian (LG) beams, tightly-focused LG Bessel cylindrical vector...
A metasurface is a planar optical device that controls the phase, amplitude, and polarization of light through subwavelength-scale unit elements, called meta-atom. The tunability plasmonic vortex lens (PVL) which generates surface plasmon polaritons (SPPs) carrying orbital angular momentum can be improved by using However, conventional PVLs exhibit nonuniform field profiles according to incident states owing spin-orbital interaction (SOI) effect observed during SPP excitation. This paper...
In article 2300929, Junsuk Rho and co-workers present two scalable methods for manufacturing near-infrared metalenses.The first method produces a 1 cm diameter, 0.53 numerical aperture (NA) polarization-independent metalens composed of hydrogenated amorphous silicon.The second creates 5 mm NA polarizationdependent silicon-nanoparticle-embedded resin.Both metalenses exhibit high-resolution imaging capabilities, making significant progress in production optical technology. Near-INfrared MetaleNses
Diffraction is a fundamental phenomenon that reveals the wave nature of light. When plane transmitted or reflected from grating other periodic structures, diffracted light waves propagate at several angles are specified by period given structure. optical shorter than wavelength, constructive interference rays subwavelength-scale forms uniform wave. Many studies have shown through appropriate design meta-atom geometry, metasurfaces can be used to control properties. However, most...
Metalenses, which exhibit superior light-modulating performance with sub-micrometer-scale thicknesses, are suitable alternatives to conventional bulky refractive lenses. However, fabrication limitations, such as a high cost, low throughput, and small patterning area, hinder their mass production. Here, we demonstrate the production of low-cost, high-throughput, large-aperture visible metalenses using an argon fluoride immersion scanner wafer-scale nanoimprint lithography. Once 12-inch master...
In our study, we introduce wavelength-multiplexed orbital angular momentum meta-holography, aiming to expand holographic information channels by leveraging light's wavelength and (OAM). We selectively employed red, green, blue as primary colors, incorporated four unique OAM (-2, -1, 1, 2). Through the utilization of a metasurface comprising three distinct types wavelength-selective meta-atoms, successfully encoded twelve images onto single metasurface. This advancement holds significant...
Recent advances in metasurface lenses (metalenses) have shown great potential for opening a new era compact imaging, photography, light detection and ranging (LiDAR), virtual reality/augmented reality (VR/AR) applications. However, the fundamental trade-off between broadband focusing efficiency operating bandwidth limits performance of metalenses, resulting chromatic aberration, angular relatively low efficiency. In this study, deep-learning-based image restoration framework is proposed to...