Results 31 to 40 of about 390,355 (301)
Ultralow loss visible light metamaterials assembled by metaclusters
Nanophotonics, 2022 Optical metamaterials give birth to the control and regulation of light. However, because of strong energy dissipation and fabrication difficulty in meta-atoms, low-loss isotropic three dimensional negative index metamaterials (NIMs) in the visible ...
Zhao Jing +10 more
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Graphene/4H-SiC Schottky photodetector operating in the visible spectrum range [PDF]
EPJ Web of Conferences, 2023 In this work, we present the first experimental results on a Schottky photodetector based on Silicon Carbide (SiC) and Graphene (Gr) designed to operate in the visible spectral range.
Mallemace Elisa D. +6 more
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Characterization of Red, Pink, Orange, and Purple Gem-Quality Spinel from Four Important Areas
Crystals, 2023 Spinel is a precious stone with a long history. In ancient societies spinel was considered to be an imitation of ruby. With the depletion of ruby mineral resources, gem—grade spinel has attracted more and more attention from consumers. In the last decade,
Qian Xu, Bo Xu, Yujie Gao, Siying Li
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Visible absorption spectrum of liquid ethylene [PDF]
Proceedings of the National Academy of Sciences, 1981 The visible absorption spectrum of liquid ethylene at ≈ 108 K from 5500 Å to 7200 Å was measured by using a pulsed tunable dye laser, immersed-transducer, gated-detection opto-acoustic spectroscopy technique. The absorption features show the strongest band with an absorption coefficient of ≈2 × 10 -2 cm -
E T, Nelson, C K, Patel
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Visible spectrum waveguiding in bulk CMOS
Optics Express, 2023 Waveguiding across the visible spectrum in an unmodified bulk CMOS chip is reported. The chip is fabricated in a standard CMOS process, and a simple wet etch removes metal in predetermined locations to expose glass rib waveguides. A modified Euler bend is introduced to improve bend radii by nearly an order of magnitude in the rib waveguides, and upper ...
Debjit Sarkar, Ali Hajimiri
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Palm-Vein Verification Using Images From the Visible Spectrum
IEEE Access, 2021 In this paper, we investigate into utilization of images from the visible light (RGB) spectrum for identity verification based on the palm-veins.
Sungchul Cho +3 more
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The visible spectrum of zirconium dioxide, ZrO2 [PDF]
The Journal of Chemical Physics, 2011 The electronic spectrum of a cold molecular beam of zirconium dioxide, ZrO2, has been investigated using laser induced fluorescence (LIF) in the region from 17 000 cm−1 to 18 800 cm−1 and by mass-resolved resonance enhanced multi-photon ionization (REMPI) spectroscopy from 17 000 cm−1–21 000 cm−1.
Le, Ahn +6 more
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The color of soils as a basis for proximal sensing of their composition
Бюллетень Почвенного института им. В.В. Докучаева, 2016 The color is one of the main morphological properties of soils, as it integrally reflects their material composition. Most of the macro-, micro- and nano-morphological methods in pedology are based on the analysis of soil reflectance characteristics ...
I. Yu. Savin +4 more
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Intense ultraviolet–visible–infrared full-spectrum laser
Light: Science & Applications, 2023 A high-brightness ultrabroadband supercontinuum white laser is desirable for various fields of modern science. Here, we present an intense ultraviolet-visible-infrared full-spectrum femtosecond laser source (with 300–5000 nm 25 dB bandwidth) with 0.54 mJ
Lihong Hong +10 more
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PhotonicsMetasurfaces are opening promising flexibilities to reshape the wavefront of electromagnetic waves. Notable optical phenomena are observed with the tailored surface plasmon, which is excited by metallic components in the visible spectrum.
Huiyu Li +4 more
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