Results 11 to 20 of about 60,075 (261)
Optical and Thermal Design and Analysis of Phase-Change Metalenses for Active Numerical Aperture Control [PDF]
Nanomaterials, 2022 The control of a lens’s numerical aperture has potential applications in areas such as photography and imaging, displays, sensing, laser processing and even laser-implosion fusion.
George Braid +4 more
doaj +2 more sources
A Metalens with a Near-Unity Numerical Aperture [PDF]
Nano Letters, 2018 The numerical aperture (NA) of a lens determines its ability to focus light and its resolving capability. Having a large NA is a very desirable quality for applications requiring small light-matter interaction volumes or large angular collections. Traditionally, a large NA lens based on light refraction requires precision bulk optics that ends up being
Ramon Paniagua-Domínguez +2 more
exaly +4 more sources
Very High Numerical Aperture Fibers [PDF]
IEEE Photonics Technology Letters, 2004 Air-silica microstructured fibers are designed and fabricated to yield numerical aperture (NA) greater than 0.9. A model is presented which accurately predicts the structural parameters required in order to realize high NAs. Such fibers have application in lasers and laser-induced-fluorescence systems.
W J Wadsworth +2 more
exaly +2 more sources
Ultrahigh numerical aperture meta-fibre for flexible optical trapping [PDF]
Light: Science & Applications, 2021 Strong focusing on diffraction-limited spots is essential for many photonic applications and is particularly relevant for optical trapping; however, all currently used approaches fail to simultaneously provide flexible transportation of light ...
Malte Plidschun +5 more
doaj +2 more sources
Results in Physics, 2018 A novel design of circular hybrid photonic crystal fiber (CH-PCF) with highly nonlinearity and high numerical aperture (NA) is introduced in this paper.
Bikash Kumar Paul +3 more
doaj +3 more sources
High numerical aperture multilayer Laue lenses. [PDF]
Sci Rep, 2015 AbstractThe ever-increasing brightness of synchrotron radiation sources demands improved X-ray optics to utilise their capability for imaging and probing biological cells, nanodevices and functional matter on the nanometer scale with chemical sensitivity.
Morgan AJ +14 more
europepmc +6 more sources
Optical trapping at low numerical aperture [PDF]
Journal of the European Optical Society-Rapid Publications, 2011 A theory of optical trapping at low Numerical Aperture (NA) is presented. The theory offers an analytical description of the competition between the stabilizing gradient and destabilizing scattering force.
Stallinga S.
doaj +5 more sources
Ultrahigh Numerical Aperture Metalens at Visible Wavelengths [PDF]
Nano Letters, 2018 22 pages, 7 figures, an original journal ...
Haowen Liang +2 more
exaly +5 more sources
Design of a Highly Sensitive Photonic Crystal Fiber Sensor for Sulfuric Acid Detection
Micromachines, 2022 In this research, a photonic crystal fiber (PCF)-based sulfuric acid detector is proposed and investigated to identify the exact concentration of sulfuric acid in a mixture with water.
Md. Ahasan Habib +4 more
doaj +1 more source
Numerical Aperture-Dependent Spatial Scaling of Plasma Channels in HPHT Diamond
Photonics, 2023 The investigation of plasma channels induced by focused ultra-short 1030-nm laser pulses in bulk of synthetic High Pressure High Temperature (HPHT) diamond revealed strong dependence of their spatial parameters on the used numerical aperture of the lens (
Yulia Gulina +4 more
doaj +1 more source