High Numerical Aperture Achromatic Meta‐Devices Through Dispersion Compensation
Sign Up to like & getrecommendations! Published in 2025 at "Advanced Functional Materials"
DOI: 10.1002/adfm.202515507
Abstract: Dispersion engineering is a long‐standing challenge in optical systems, and it is particularly important for metasurfaces, which naturally suffer from strong chromatic aberrations due to their ultralow profile. Stacks of metasurfaces have recently implemented dispersion… read more here.
Keywords: dispersion compensation; meta devices; numerical aperture; dispersion ... See more keywords
Focusing properties of radially polarized Bessel-like beam with radial cosine phase wavefront by a high numerical aperture objective
Sign Up to like & getrecommendations! Published in 2017 at "Optical and Quantum Electronics"
DOI: 10.1007/s11082-017-1050-3
Abstract: By the use of the vector diffraction theory, the focusing properties of radially polarized Bessel-like beam with radial cosine wave front phase through a high numerical-aperture (NA) lens are investigated theoretically and numerically in this… read more here.
Keywords: phase; cosine; focusing properties; numerical aperture ... See more keywords
Polarization independent high transmission large numerical aperture laser beam focusing and deflection by dielectric Huygens’ metasurfaces
Sign Up to like & getrecommendations! Published in 2017 at "Optics Communications"
DOI: 10.1016/j.optcom.2017.05.031
Abstract: Abstract In this letter, we propose all-dielectric Huygens’ metasurface structures to construct high numerical aperture flat lenses and beam deflecting devices. The designed metasurface consists of two-dimensional array of all-dielectric nanodisk resonators with spatially varying… read more here.
Keywords: dielectric huygens; aperture; high transmission; numerical aperture ... See more keywords
Transport of energy through the focal region of a high-numerical-aperture system with efficient annular focusing of light beam and its optimum thin-film linear-to-radial polarization conversion
Sign Up to like & getrecommendations! Published in 2018 at "Optics Communications"
DOI: 10.1016/j.optcom.2018.04.078
Abstract: Abstract In a previous paper [Opt. Commun. 407 (2018) 217–226], there was proposed a light-efficient, high-numerical-aperture focusing system which is based on a monolithic assembly of an axicon and an inclined parabolic annular reflector (AXIPAR)… read more here.
Keywords: film linear; energy; thin film; polarization ... See more keywords
High-efficiency broadband photonic crystal fiber metalens with a large numerical aperture
Sign Up to like & getrecommendations! Published in 2021 at "Optics Communications"
DOI: 10.1016/j.optcom.2020.126524
Abstract: Abstract Photonic Crystal Fiber (PCF), as a novel optical fiber, is widely used in the applications of dispersion control, supercontinuum generation, fiber sensing, etc. However, the numerical aperture (NA) of most PCFs is normally too… read more here.
Keywords: crystal fiber; fiber; photonic crystal; efficiency ... See more keywords
Label-Free Single-Molecule Imaging with Numerical-Aperture-Shaped Interferometric Scattering Microscopy
Sign Up to like & getrecommendations! Published in 2017 at "ACS Photonics"
DOI: 10.1021/acsphotonics.6b00912
Abstract: Our ability to optically interrogate nanoscopic objects is controlled by the difference between their extinction cross sections and the diffraction-limited area to which light can be confined in the far field. We show that a… read more here.
Keywords: single molecule; numerical aperture; label free; microscopy ... See more keywords
Anti-aliased metasurfaces beyond the Nyquist limit
Sign Up to like & getrecommendations! Published in 2024 at "Nature Communications"
DOI: 10.1038/s41467-024-55095-z
Abstract: Sampling is a pivotal element in the design of metasurfaces, enabling a broad spectrum of applications. Despite its flexibility, sampling can result in reduced efficiency and unintended diffractions, which are more pronounced at high numerical… read more here.
Keywords: aliased metasurfaces; spectrum; high numerical; anti aliased ... See more keywords
3D-printed aberration-free terahertz metalens for ultra-broadband achromatic super-resolution wide-angle imaging with high numerical aperture
Sign Up to like & getrecommendations! Published in 2025 at "Nature Communications"
DOI: 10.1038/s41467-024-55624-w
Abstract: Terahertz (THz) lens constitutes a vital component in the THz system. Metasurfaces-based THz metalenses and classical bulky lenses are severely constrained by chromatic/ spherical aberration and the diffraction limit. Consequently, achromatic super-resolution THz lenses are… read more here.
Keywords: thz; resolution; terahertz metalens; numerical aperture ... See more keywords
High numerical aperture, highly birefringent novel photonic crystal fibre for medical imaging applications
Sign Up to like & getrecommendations! Published in 2018 at "Electronics Letters"
DOI: 10.1049/el.2017.3694
Abstract: A novel Zeonex based porous fibre is proposed for biomedical imaging and polarisation preserving applications of terahertz waves. The standard finite element method is used to simulate the propagation characteristics of the fibre that shows… read more here.
Keywords: novel; high numerical; aperture highly; highly birefringent ... See more keywords
Practical and Accurate Evaluation of Numerical Aperture and Beam Quality Factor in Photonic Crystal Fibers by Mechanical Learning
Sign Up to like & getrecommendations! Published in 2025 at "IEEE Photonics Journal"
DOI: 10.1109/jphot.2024.3506622
Abstract: This paper presents a convolutional neural network (CNN) model, enhanced with the convolutional block attention module (CBAM), designed to accurately predict the beam quality factor M2, and numerical aperture (NA) of photonic crystal fibers. The… read more here.
Keywords: beam quality; quality factor; beam; photonic crystal ... See more keywords
Welding Fused Silica Glass by Picosecond Pulsed Laser With Low Numerical Aperture
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Micro and Nano-Manufacturing"
DOI: 10.1115/1.4045467
Abstract: Researches on glass welding using tightly focused ultrafast lasers have attracted much attention. However, optical systems with low numerical aperture (NA) in laser material processing are commonly used in industry applications. Transmission welding of two… read more here.
Keywords: fused silica; low numerical; glass; silica glass ... See more keywords