Results 51 to 60 of about 40,871 (163)
X-waves Generated at Second Harmonic
, 2002 The process of optical frequency doubling can lead, in the undepleted regime, to the generation of a X-wave envelope with group velocity locked to the pump beam. Its parameters and its angular spectrum, are directly related to the zero- and first-order dispersive features of the nonlinear process.
Conti C., Trillo S.
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Second-harmonic generation in GaS crystals
Solid State Communications, 1997 Abstract Second-harmonic generation in the layered semiconductor GaS excited with the wavelength λ = 1579 nm is investigated with the Maker fringe technique. It is shown that the second-harmonic signal originates from domains in the crystal, which consist of the noncentrosymmetric C53v polytype.
Allakhverdiev, K +3 more
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Two-Photon Luminescence and Second Harmonic Generation from Gold Micro-Plates
Sensors, 2014 Micron-sized gold plates were prepared by reducing chloroauric acid with lemongrass extract. Their two-photon luminescence (TPL) and second harmonic generation (SHG) were investigated.
Xu Wang +6 more
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Citation: 'second harmonic generation' in the IUPAC Compendium of Chemical Terminology, 5th ed.; International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.08871 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
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Multipolar second harmonic generation in a symmetric nonlinear metamaterial
Scientific Reports, 2017 Optical nonlinearities are intimately related to the spatial symmetry of the nonlinear media. For example, the second order susceptibility vanishes for centrosymmetric materials under the dipole approximation.
Omri Wolf +3 more
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Second Harmonic Generation of Unpolarized Light
Physical Review Letters, 2017 A Mueller tensor mathematical framework was applied for predicting and interpreting the second harmonic generation (SHG) produced with an unpolarized fundamental beam. In deep tissue imaging through SHG and multiphoton fluorescence, partial or complete depolarization of the incident light complicates polarization analysis.
Changqin, Ding +3 more
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Scientific Reports, 2017 For ferroelectric materials, where the polar state breaks the inversion symmetry, second harmonic generation is a useful tool to prove their ferroelectric properties.
Jie-su Wang +5 more
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Arbitrary orbital angular momentum addition in second harmonic generation
New Journal of Physics, 2014 We demonstrate second harmonic generation performed with optical vortices with different topological charges imprinted on orthogonal polarizations. Besides the intuitive charge doubling, we implement arbitrary topological charge addition on the second ...
W T Buono +4 more
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Angular-polarization-engineered interferometric second-harmonic generation microscopy
PhotoniXConventional second-harmonic generation (SHG) microscopy fundamentally lacks the phase sensitivity, which is essential for characterizing symmetry properties that depend on phase information.
Xuan Zhao +5 more
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Metasurface-assisted phase-matching-free second harmonic generation in lithium niobate waveguides
Nature Communications, 2017 Phase matching is a crucial condition for nonlinear optical processes. Here, Wang et al. demonstrate that a gradient metasurface composed of phased array antennas allows phase-matching-free frequency conversion over a pump wavelength range of almost 100 ...
Cheng Wang +7 more
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