Results 11 to 20 of about 223,073 (288)
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.
Wadsworth, W J +6 more
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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
Ramón Paniagua-Domínguez +10 more
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Nanophotonics, 2020 Owing to the potential to manipulate simultaneously amplitude and phase of electromagnetic wave, complex-amplitude holographic metasurfaces (CAHMs) can achieve improved image-reconstruction quality compared with amplitude-only and phase-only ones ...
Mu Yongheng +4 more
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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
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Ultrahigh Numerical Aperture Metalens at Visible Wavelengths [PDF]
Nano Letters, 2018 22 pages, 7 figures, an original journal ...
Liang, Haowen +10 more
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Компьютерная оптика, 2021 The effect of the width of the angular spectrum (numerical aperture) of a broadband-frequency wave-field probing a layered object on the signal of an autocorrelation low-coherence interferometer (ALCI) under spatially coherent and incoherent illumination
D.V. Lyakin, V.P. Ryabukho
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Femtosecond Laser Fabrication of Submillimeter Microlens Arrays with Tunable Numerical Apertures
Micromachines, 2022 In recent years, the demand for optical components such as microlenses has been increasing, and various methods have been developed. However, fabrication of submillimeter microlenses with tunable numerical aperture (NA) on hard and brittle materials ...
Tongzhen Yang +8 more
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Engineering Proceedings, 2023 This paper investigates the design and tuning of a Broadband Dispersion Compensating Modified Honeycomb Lattice Photonic Crystal Fiber (MHL-PCF) with outstanding features such as strong birefringence and nonlinearity.
Amit Halder +3 more
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Minimal focal spot obtained by focusing circularly polarized light
Компьютерная оптика, 2023 In this paper, using the Richards-Wolf equations, we analyze focusing circularly polarized light with flat diffractive lenses. It is shown that as the numerical aperture of the lens increases, the size of the focal spot first decreases and then begins to
S.S. Stafeev, V.D. Zaitcev, V.V. Kotlyar
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FEM-based modeling of microsphere-enhanced interferometry
Light: Advanced Manufacturing, 2022 To improve the lateral resolution in microscopic imaging, microspheres are placed close to the object’ s surface in order to support the imaging process by optical near-field information.
Tobias Pahl +3 more
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