Results 101 to 110 of about 27,968 (274)
On upper bounds for the pseudo-achromatic index
, 1997 In this paper, we give another approach to the pseudo-achromatic index and the achromatic index of a graph and study upper bounds for them. We have obtained the following best possible upper bounds: 1.(i) Ψ′(G) ⩽ Ψ′S(G) ⩽ ⌊(e(G) + χ′(G))/2⌋; and2.(ii) Ψ′(
Fu, Hung-Lin, Chiang, Nam-Po
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Octave bandwidth photonic fishnet-achromatic-metalens
Nature Communications, 2020 Planar structured interfaces, also known as metasurfaces, are continuously attracting interest owing to their ability to manipulate fundamental attributes of light, including angular momentum, phase, or polarization.
A. Ndao +5 more
semanticscholar +1 more source
Journal of Raman Spectroscopy, EarlyView.We report the development and use of a transmission Raman spectroscopy (TRS) system for a more accurate but nonintrusive way of authentication of API in coated HCQ tablets which otherwise is not possible using the backscattered (BS) configuration of Raman spectroscopy. The coating interference is found to be almost zero in case of the TRS and a greater
Vijay Kumar +5 more
wiley +1 more source
Terahertz achromatic quarter-wave plate
, 2006 International audiencePhase retardera usually present a strong frequency dependence. We discuss the design and characterization of a terahertz achromatic quarter-wave plate.
Masson, Jean-Baptiste, Gallot, Guilhem
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Supercritical Angle Fluorescence and Raman Techniques in Biophotonics
Laser &Photonics Reviews, EarlyView.Supercritical angle fluorescence (SAF) microscopy and supercritical angle Raman (SAR) spectroscopy have emerged as powerful tools in the field of biophotonics, enabling high‐resolution imaging and spectroscopy of biological specimens near interfaces. This review article provides a comprehensive overview of the principles, techniques, applications, and ...
Subir Das +2 more
wiley +1 more source
PhotoniXBroadband achromatic meta-devices have emerged as a transformative platform for dispersion-engineered wavefront manipulation, offering significant potential for full-color imaging, multi-band spectral sensing, and integrated photonic systems.
Jiahao Wang +10 more
doaj +1 more source
Laser &Photonics Reviews, EarlyView.This work elucidates the previously unknown thermal dynamics during sub‐micrometer photothermal laser printing of zinc oxide using a non‐invasive transmission‐based in situ measurement. The elevated temperatures are shown to be highly localized around the laser focal spot, reaching average temperature increases of about 113 K per mW of laser power ...
Steven Kraus +4 more
wiley +1 more source
Laser &Photonics Reviews, EarlyView.Bayesian optimization combined with in situ quantitative phase imaging enables autonomous correction of layer‐height deviations in projection multi‐photon lithography. By jointly tuning model parameters and grayscale exposure settings, the method achieves more uniform and accurate layers within 300 prints, offering a fast, data‐efficient route to ...
Jason E. Johnson, Xianfan Xu
wiley +1 more source
Lightness dependence of achromatic loci in color-appearance coordinates
Frontiers in Psychology, 2015 Shifts in the appearance of color under different illuminant chromaticity are known to be incomplete, and fit nicely with a simple linear transformation of cone responses that aligns the achromatic points under two illuminants. Most chromaticity-transfer
Ichiro eKuriki
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On the pseudo-achromatic number problem
Theoretical Computer Science, 2008 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Chen, Jianer +4 more
openaire +3 more sources