Experimental evidence for dynamic friction on rock fractures from frequency‐dependent nonlinear hysteresis and harmonic generation
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Geophysical Research"
DOI: 10.1002/2017jb014219
Abstract: Frictional properties affect the propagation of high amplitude seismic waves across rock fractures and faults. Laboratory evidence suggests that these properties can be measured in active seismic surveys, potentially offering a route to characterizing friction… read more here.
Keywords: rock fractures; harmonic generation; friction; dynamic friction ... See more keywords
New Opportunities: Second Harmonic Generation of Boron‐Doped Graphene Quantum Dots for Stem Cells Imaging and Ultraprecise Tracking in Wound Healing
Sign Up to like & getrecommendations! Published in 2019 at "Advanced Functional Materials"
DOI: 10.1002/adfm.201902235
Abstract: Second harmonic generation (SHG) has recently emerged, having the advantages of no bleaching, no blinking, and no signal saturation, as well as a high signal to‐noise ratio compared to fluorescence. Existing SHG probes are based… read more here.
Keywords: doped graphene; stem; graphene quantum; second harmonic ... See more keywords
Ultrafast Sub‐100 fs All‐Optical Modulation and Efficient Third‐Harmonic Generation in Weyl Semimetal Niobium Phosphide Thin Films
Sign Up to like & getrecommendations! Published in 2022 at "Advanced Materials"
DOI: 10.1002/adma.202106733
Abstract: Since their experimental discovery in 2015, Weyl semimetals have generated a large amount of attention due their intriguing physical properties that arise from their linear electron dispersion relation and topological surface states. In particular, in… read more here.
Keywords: third harmonic; thin films; harmonic generation; niobium phosphide ... See more keywords
High‐Throughput Scanning Second‐Harmonic‐Generation Microscopy for Polar Materials
Sign Up to like & getrecommendations! Published in 2023 at "Advanced Materials"
DOI: 10.1002/adma.202300348
Abstract: The Materials Genome Initiative aims to discover, develop, manufacture, and deploy advanced materials at twice the speed of conventional approaches. To achieve this, high‐throughput characterization is essential for the rapid screening of candidate materials. In… read more here.
Keywords: second harmonic; microscopy; high throughput; harmonic generation ... See more keywords
Nanoscale Optical Imaging of 2D Semiconductor Stacking Orders by Exciton‐Enhanced Second Harmonic Generation
Sign Up to like & getrecommendations! Published in 2022 at "Advanced Optical Materials"
DOI: 10.1002/adom.202200085
Abstract: Second harmonic generation (SHG) is a nonlinear optical response arising exclusively from broken inversion symmetry in the electric-dipole limit. Recently, SHG has attracted widespread interest as a versatile and noninvasive tool for characterization of crystal… read more here.
Keywords: harmonic generation; optical imaging; nanoscale optical; symmetry ... See more keywords
Nonlinear Strong Coupling by Second‐Harmonic Generation Enhancement in Plasmonic Nanopatch Antennas
Sign Up to like & getrecommendations! Published in 2022 at "Advanced Optical Materials"
DOI: 10.1002/adom.202200510
Abstract: Enhanced electromagnetic fields within plasmonic nanocavity mode volumes enable multiple significant effects that lead to applications in both the linear and nonlinear optical regimes. In this work, enhanced second‐harmonic generation (SHG) is demonstrated from individual… read more here.
Keywords: second harmonic; plasmonic nanopatch; harmonic generation; strong coupling ... See more keywords
Phase Matching via Plasmonic Modal Dispersion for Third Harmonic Generation
Sign Up to like & getrecommendations! Published in 2022 at "Advanced Science"
DOI: 10.1002/advs.202201180
Abstract: The overall effectiveness of nonlinear optical processes along extended nonlinear media highly depends on the fulfillment of the phase‐matching condition for pump and generated fields. This is traditionally accomplished by exploiting the birefringence of nonlinear… read more here.
Keywords: modal dispersion; phase matching; plasmonic modal; third harmonic ... See more keywords
[K2PbX][Ga7S12] (X = Cl, Br, I): The First Lead‐Containing Cationic Moieties with Ultrahigh Second‐Harmonic Generation and Band Gaps Exceeding the Criterion of 2.33 eV
Sign Up to like & getrecommendations! Published in 2023 at "Advanced Science"
DOI: 10.1002/advs.202207630
Abstract: In contrast to anionic group theory of nonlinear optical (NLO) materials that second‐harmonic generation (SHG) responses mainly originate from anionic groups, structural regulation on the cationic groups of salt‐inclusion chalcogenides (SICs) is performed to make… read more here.
Keywords: ga7s12; second harmonic; band gaps; harmonic generation ... See more keywords
The Enhanced Second‐Harmonic Generation Based on Magnetic‐Lorentz‐Force Effect
Sign Up to like & getrecommendations! Published in 2019 at "Annalen der Physik"
DOI: 10.1002/andp.201800470
Abstract: Electromagnetic coupling generates a second‐harmonic signal via the magnetic component of Lorentz force of free electrons. In this work, the enhancement of artificial second‐harmonic generation (SHG) from plasmonic metamaterial with near‐field electromagnetic coupling is theoretically… read more here.
Keywords: lorentz force; electromagnetic coupling; second harmonic; harmonic generation ... See more keywords
Dielectric Chiral Metasurfaces for Second‐Harmonic Generation with Strong Circular Dichroism
Sign Up to like & getrecommendations! Published in 2020 at "Annalen der Physik"
DOI: 10.1002/andp.202000078
Abstract: Dielectric chiral metasurfaces can generate harmonic waves with high efficiency and strong circular dichroism (CD), when they are supported by metallic substrates. Numerical results show that the second‐harmonic generation (SHG) efficiency of about 10−3% for… read more here.
Keywords: chiral metasurfaces; circular dichroism; dielectric chiral; second harmonic ... See more keywords
Dynamics of resonant self‐focusing on second harmonic generation of Gaussian laser beam in a rippled density plasma
Sign Up to like & getrecommendations! Published in 2021 at "Contributions to Plasma Physics"
DOI: 10.1002/ctpp.202100031
Abstract: Resonant second harmonic generation by a Gaussian laser beam in a rippled density plasma is studied using the moment theory approach. The nonlinearity arises through the relativistic mass effect and ponderomotive forces. The laser beam… read more here.
Keywords: second harmonic; laser beam; harmonic generation; density ... See more keywords