Results 31 to 40 of about 223,073 (288)
Variable numerical-aperture temporal-coherence measurement of resonant-cavity LEDs [PDF]
, 2003 The first interferometric measurements of temporal-coherence length variation with numerical aperture (NA) are described for 650 nm, resonant-cavity light-emitting diodes (LEDs) agreeing with spectrally derived results.
Coutinho, RC +6 more
core +1 more source
High numerical aperture holographic microscopy reconstruction with extended z range [PDF]
, 2015 An holographic microscopy reconstruction method compatible with high numerical aperture microscope objective (MO) up to NA=1.4 is proposed. After off axis and reference field curvature corrections, and after selection of the +1 grating order holographic ...
Donnarumma, Dario +3 more
core +4 more sources
Benzene Shape Photonic Crystal Fiber Based Plasma Sensor: Design and Analysis
Photonic Sensors, 2018 A novel benzene core photonic crystal fiber (BC-PCF) is proposed for plasma sensing applications. The proposed BC-PCF parameters have been tuned to gain high sensitivity, high numerical aperture (NA), and low confinement loss, and modality over the ...
Md. Toriqul Islam +3 more
doaj +1 more source
Thin high numerical aperture metalens
Optics Express, 2017 We designed, fabricated, and characterized a thin metalens in an amorphous silicon film of diameter 30 µm, focal length equal to the incident wavelength 633 nm. The lens is capable of simultaneously manipulating the state of polarization and phase of incident light.
Kotlyar, V. V. +7 more
openaire +4 more sources
Trapped Ion Imaging with a High Numerical Aperture Spherical Mirror [PDF]
, 2009 Efficient collection and analysis of trapped ion qubit fluorescence is essential for robust qubit state detection in trapped ion quantum computing schemes.
Alt W +9 more
core +1 more source
Tight focal spots using azimuthally polarised light from a Fresnel cone [PDF]
, 2020 When focusing a light beam at high numerical aperture, the resulting electric field profile in the focal plane depends on the transverse polarisation profile, as interference between different parts of the beam needs to be taken into account.
Franke-Arnold, S. +3 more
core +2 more sources
Design of 3D SAW Filters Based on the Spectral Element Method
IEEE Access, 2023 Surface acoustic wave (SAW) devices are key components in 5G communication systems, and the design of SAW filters with high frequency, high performance and high reliability is a necessary and challenging task. In this work, SAW resonators with $LiNbO_{3}
Yiwen Yao +4 more
doaj +1 more source
A Novel Hexahedron Photonic Crystal Fiber in Terahertz Propagation: Design and Analysis
Photonics, 2019 A novel hexahedron fiber has been proposed for biomedical imaging applications and efficient guiding of terahertz radiation. A finite element method (FEM) has been applied to investigate the guiding properties rigorously.
Bikash Kumar Paul +3 more
doaj +1 more source
Theory of Optical Tweezers [PDF]
, 1999 We derive a partial-wave (Mie) expansion of the axial force exerted on a transparent sphere by a laser beam focused through a high numerical aperture objective. The results hold throughout the range of interest for practical applications.
+9 more
core +2 more sources
Large-area, high-numerical-aperture, freeform metasurfaces
Optica Design and Fabrication Congress 2025 (FlatOptics, Freeform, OFT), 2023 We design and experimentally demonstrate multifunctional super-dispersive metalenses using a novel gradient-based design framework that enhances nonlocal interactions between nanostructures. We demonstrate its application in high throughput additive manufacturing systems.
You Zhou +4 more
openaire +1 more source