Tailoring Group Delay Dispersion of Spatial Phaser using Anisotropic Metasurface and Polarized Incident Waves
Sign Up to like & getrecommendations! Published in 2023 at "Advanced Optical Materials"
DOI: 10.1002/adom.202202844
Abstract: Metasurface‐based spatial phaser, exhibiting dispersive group delay responses, is able to perform real‐time analogue signal processing on the temporal spectrum of spatial electromagnetic waves, e.g., Fourier transformation, pulse chirping, pulse spread, and compression. The functionality… read more here.
Keywords: dispersion; spatial phaser; group delay; phaser ... See more keywords
A negative group delay rectangular waveguide based on corrugated tantalum nitride slow wave structure
Sign Up to like & getrecommendations! Published in 2023 at "Microwave and Optical Technology Letters"
DOI: 10.1002/mop.33695
Abstract: In this letter, a rectangular waveguide with controlled negative group delay (NGD) is proposed. The equivalent circuit of the structure is proposed and analyzed. The NGD value and NGD center frequency can be adjusted continuously… read more here.
Keywords: structure; negative group; rectangular waveguide; group ... See more keywords
Melody extraction from music using modified group delay functions
Sign Up to like & getrecommendations! Published in 2017 at "International Journal of Speech Technology"
DOI: 10.1007/s10772-017-9397-1
Abstract: Modified group delay based algorithms for estimation of melodic pitch sequences from heterphonic/polyphonic music are discussed in this paper. Two different variants of the modified group delay function are proposed, namely, (a) system based—MODGD (Direct)… read more here.
Keywords: melody extraction; group delay; group; modified group ... See more keywords
Optical solitons with differential group delay and weak non-local nonlinearity by extended trial function method
Sign Up to like & getrecommendations! Published in 2018 at "Optik"
DOI: 10.1016/j.ijleo.2018.04.005
Abstract: Abstract This paper studies optical soliton solutions with differential group delay and non-local nonlinearity. The extended trial function approach retrieves bright and singular soliton solutions to the model. The existence criteria for these solitons are… read more here.
Keywords: non local; group delay; extended trial; differential group ... See more keywords
Optical soliton perturbation with differential group delay and parabolic law nonlinearity using exp(−ϕ(ξ))-expansion method
Sign Up to like & getrecommendations! Published in 2018 at "Optik"
DOI: 10.1016/j.ijleo.2018.07.086
Abstract: Abstract In this study, soliton solutions with differential group delay, having parabolic law nonlinearity, are constructed. The exp(−ϕ(ξ))-expansion method has been utilized. Additional solutions, including plane wave solutions and periodic singular waves naturally emerge from… read more here.
Keywords: delay parabolic; group delay; law nonlinearity; differential group ... See more keywords
Optical solitons with differential group delay for coupled Kundu–Eckhaus equation using extended simplest equation approach
Sign Up to like & getrecommendations! Published in 2020 at "Optik"
DOI: 10.1016/j.ijleo.2019.164051
Abstract: Abstract The extended simplest equation approach is implemented to secure soliton solutions, having differential group delay, for Kundu–Eckhaus equation in presence of four-wave mixing terms. The algorithm also lists additional solutions that emerge from the… read more here.
Keywords: group delay; differential group; simplest equation; equation approach ... See more keywords
The group-delay consensus for second-order multi-agent systems by piecewise adaptive pinning control in part of time interval
Sign Up to like & getrecommendations! Published in 2019 at "Physica A: Statistical Mechanics and its Applications"
DOI: 10.1016/j.physa.2018.08.107
Abstract: Abstract This paper addresses the group-delay consensus of second-order nonlinear multi-agent systems by piecewise adaptive pinning control in part of time interval. The topology of the networked system is assumed to be directed and weakly… read more here.
Keywords: consensus second; consensus; agent; group delay ... See more keywords
Antimatched Electromagnetic Metasurfaces for Broadband Arbitrary Phase Manipulation in Reflection
Sign Up to like & getrecommendations! Published in 2018 at "ACS Photonics"
DOI: 10.1021/acsphotonics.7b01415
Abstract: Metasurfaces impart phase discontinuities on impinging electromagnetic waves that are typically limited to 0–2π. Here, we demonstrate that multiresonant metasurfaces can break free from this limitation and supply arbitrarily large, tunable time delays over ultrawide… read more here.
Keywords: phase; group delay; electromagnetic metasurfaces; reflection ... See more keywords
A broadband achromatic metalens for focusing and imaging in the visible
Sign Up to like & getrecommendations! Published in 2018 at "Nature Nanotechnology"
DOI: 10.1038/s41565-017-0034-6
Abstract: A key goal of metalens research is to achieve wavefront shaping of light using optical elements with thicknesses on the order of the wavelength. Such miniaturization is expected to lead to compact, nanoscale optical devices… read more here.
Keywords: imaging visible; achromatic metalens; broadband achromatic; group delay ... See more keywords
Propagation properties of sub-millimeter waves in foggy conditions
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Applied Physics"
DOI: 10.1063/1.5083711
Abstract: The propagation of millimeter (MMW) and submillimeter (terahertz, THz) waves in the atmosphere is subject to absorptive and dispersive effects. The resulting attenuation and temporal group delay increase in cloudy and hazy weather. In this… read more here.
Keywords: propagation; millimeter; attenuation; group delay ... See more keywords
Compact Lowpass Filter with Ultra-High Figure-of-Merit and Flat Group Delay
Sign Up to like & getrecommendations! Published in 2018 at "IETE Journal of Research"
DOI: 10.1080/03772063.2017.1381046
Abstract: ABSTRACT This paper presents a microstrip lowpass filter with compact size, and ultra-wide stopband. The structure consists of a modified hairpin resonator loaded with tapered cells and the circular patches as the suppressing cell. The… read more here.
Keywords: lowpass; lowpass filter; group delay; flat group ... See more keywords