Results 21 to 30 of about 12,562 (253)
Micromachines, 2022 Electromagnetic (EM) absorbers and emitters have attracted much interest because of their versatile applications. A photonic heterostructure composed of silicon carbide (SiC) layer/germanium (Ge) cavity/distributed Bragg reflector (DBR) has been proposed.
Chengxuan Gong, Gaige Zheng
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Rigorous coupled-wave analysis of liquid crystal polarization gratings
Optics Express, 2020 Several types of liquid crystal polarization gratings (LCPGs) can be achieved depending on their molecular configurations and diffraction properties. We perform detailed numerical studies of these LCPGs based on the rigorous coupled-wave analysis (RCWA) approach.
Jianghao Xiong, Shin-Tson Wu
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Global rigorous coupled wave analysis for design of multilayer metasurface absorbers
Optics Express, 2023 In this work, a novel Global NV-ETM RCWA method is proposed to accelerate the optimization of the periodic stepped radar absorbing structure. This method is based on the rigorous coupled-wave analysis (RCWA) utilizing the normal vector field (NV) and enhanced transmittance matrix (ETM) approach.
Lin Wang +3 more
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Effective spectral optical functions of lamellar nanogratings [PDF]
Journal of the European Optical Society-Rapid Publications, 2006 Spectral properties of lamellar sub-wavelength gratings (nanogratings) are described by effective medium approximation (EMA). Analytical spectral formulae for ordinary and extraordinary effective optical functions are derived for nanogratings consisting ...
Foldyna Martin +4 more
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Zoological Letters, 2017 Background Tunic is a cellulosic, integumentary matrix found in tunicates (Subphylum Tunicata or Urochordata). The tunics of some ascidian species and pelagic tunicates, such as salps, are nearly transparent, which is useful in predator avoidance ...
Hiroshi Kakiuchida +3 more
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Frontiers in Physics, 2021 In this paper, a hybrid numerical simulation tool is introduced and performed for GaInN-based light-emitting diodes (LEDs) with metal-embedded nanostructure to theoretically predict external quantum efficiency (EQE), which composed of finite-difference ...
Ryoya Hiramatsu +10 more
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Journal of the European Optical Society-Rapid Publications, 2021 This study proposes using double-layer wire-grid structures to create narrow-band, perfect plasmonic absorbers, which depend on polarization, for the short-wavelength visible and near-ultraviolet regions of the electromagnetic spectrum.
Atsushi Motogaito +2 more
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Symmetry Breaking as a Basis for Characterization of Dielectric Materials
SensorsThis paper introduces a novel method for measuring the dielectric permittivity of materials within the microwave and millimeter wave frequency ranges. The proposed approach, classified as a guided wave transmission system, employs a periodic transmission
Dubravko Tomić, Zvonimir Šipuš
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Glide-Shifted Dielectric Gratings for Independent Leakage and Phase Tuning in Leaky-Wave Antennas
IEEE Open Journal of Antennas and PropagationThis paper presents a comprehensive analysis of grounded glide-shifted dielectric periodic structures and their application to the design of leaky-wave antennas (LWAs).
Dubravko Tomic +2 more
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Ligand‐dependent transcriptional heterogeneity in cell cycle gene expression delays G1/S entry
FEBS Letters, EarlyView.EGF and HRG induce distinct G1/S progression programs in ErbB2‐amplified BT474 breast cancer cells. Despite activating the potent ErbB2–ErbB3 heterodimer, HRG does not accelerate cell‐cycle entry. Instead, EGF promotes earlier restriction‐point passage via ERK–FOS signaling, whereas HRG activates the AKT–MYC axis, driving transcriptional heterogeneity ...
Ririn Rahmala Febri +5 more
wiley +1 more source