Results 1 to 10 of about 10,254,059 (313)
High-speed electro-optic modulator with group velocity matching on silicon substrate [PDF]
Frontiers in Bioengineering and BiotechnologyElectro-optic modulators with low driving voltage and wide bandwidth are critical for advanced analog and digital communication systems. To achieve high-speed thin-film lithium niobate (TFLN) electro-optic modulators on silicon substrates, this work ...
Yingbo Liu +9 more
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ON THE GROUP VELOCITY OF WHISTLING ATMOSPHERICS
Solar-Terrestrial Physics, 2021 The dynamic spectrum of a whistling atmospheric is a signal of falling tone, and the group delay time of the signal as a function of frequency is formed as a result of propagation of a broadband pulse in a medium (magnetospheric plasma) with a quadratic ...
A.V. Guglielmi, B.I. Klain, A.S. Potapov
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Imaging gigahertz zero-group-velocity Lamb waves [PDF]
Nature Communications, 2019 Zero-group-velocity Lamb waves, which are surface waves with reduced losses and high Q factor, have many potential applications. The authors image such waves in 2 dimensions, and in the GHz range, with a bilayer using a time-resolved imaging technique ...
Qingnan Xie +7 more
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Microscopic theory of polariton group velocity renormalization [PDF]
Nature CommunicationsCavity exciton-polaritons exhibit ballistic transport and can achieve 100 μm in one picosecond. This ballistic transport significantly enhances mobility compared to that of bare excitons, which often move diffusively and become the bottleneck for energy ...
Wenxiang Ying +3 more
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Rogue events in the group velocity horizon. [PDF]
Sci Rep, 2012 The concept of rogue waves arises from a mysterious and potentially calamitous phenomenon of oceanic surfaces. There is mounting evidence that they are actually commonplace in a variety of different physical settings. A set of defining criteria has been advanced; this set is of great generality and therefore applicable to a wide class of systems.
Demircan A +5 more
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New Surface-Plasmon-Polariton-Like Acoustic Surface Waves at the Interface Between Two Semi-Infinite Media [PDF]
Archives of Acoustics, 2022 This paper presents theory of new shear horizontal (SH) acoustic surface waves that propagate along the interface of two semi-infinite elastic half-spaces, one of which is a conventional elastic medium and a second one an elastic metamaterial with a ...
Piotr Kiełczyński
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JGEET: Journal of Geoscience, Engineering, Environment and Technology, 2023 Hululais area lies in the pull-apart basins of the Ketaun Segment and Musi Segment fault as a part of the Sumatra Fault Zone (SFZ). The boundary normal faults of pull-apart basins play an important role as major discharge zones for geothermal fluid ...
Tavip Dwikorianto +3 more
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Advanced Electronic Materials, 2023 Improvement of transmission efficiency of spin waves in magnonic devices is crucial for high‐efficiency magnon‐based operations. However, existing techniques for enhancing spin‐wave detection signals, which either improve waveguide material quality or ...
Jiapeng Xu +9 more
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Tomographic Image of Shear Wave Structure of NE India Based on Analysis of Rayleigh Wave Data
Frontiers in Earth Science, 2021 The major scientific purpose of this work is to evaluate the geodynamic processes involved in the development of tectonic features of NE India and its surroundings. In this work, we have obtained tomographic images of the crust and uppermost mantle using
Amit Kumar +4 more
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On negative effective mass and negative group velocity in anharmonic seismic metamaterials
EPJ Applied Metamaterials, 2022 In this work, an anharmonic mass-in-mass system that can be employed as a nonlinear seismic metamaterial is represented as an equivalent anharmonic mass-spring system via an effective medium approach.
Zivieri Roberto
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