Results 31 to 40 of about 2,118,821 (229)

Graphene’s nonlinear-optical physics revealed through exponentially growing self-phase modulation

open access: yesNature Communications, 2018
Graphene enables extraordinary nonlinear-optical refraction, far exceeding predictions based on conventional nonlinear-susceptibility theory. Here, Vermeulen et al.
Nathalie Vermeulen   +9 more
doaj   +1 more source

Simulations of nonlinear harmonic generation by an internal wave beam incident on a pycnocline [PDF]

open access: yesNonlinear Processes in Geophysics, 2014
Internal wave beams generated by oceanic tidal flows propagate upward and interact with the increasing stratification found at the pycnocline. The nonlinear generation of harmonic modes by internal wave beams incident on a pycnocline has recently been ...
S. Wunsch   +3 more
doaj   +1 more source

Nonlinear Optical Properties of CdSe and CdTe Core-Shell Quantum Dots and Their Applications

open access: yesFrontiers in Physics, 2021
The strong nonlinear optical behavior of low-dimensional materials, such as quantum dots and core-shell quantum dots, has been a topic of intense research in recent years.
Um e Kalsoom   +3 more
doaj   +1 more source

Facile synthesis of ZnS–Ag2S core–shell nanospheres with enhanced nonlinear refraction

open access: yesJournal of Materials Science: Materials in Electronics, 2019
ZnS–Ag2S core–shell nano/hetero-junctions have been synthesized by a two-step co-precipitation technique, in which thin layers of Ag2S have been successfully coated on the surface of ZnS nanospheres.
A. Haghighatzadeh   +3 more
semanticscholar   +1 more source

Nonlinear Refractive Index in Rectangular Graphene Quantum Dots

open access: yesApplied Sciences, 2019
Alongside its other favorable properties, the large refraction nonlinearity of graphene-related material makes it ideal for use in optoelectronics applications.
Yonggang Qin, Xiaobo Feng, Yu Liu
doaj   +1 more source

Refraction of dispersive shock waves [PDF]

open access: yes, 2012
We study a dispersive counterpart of the classical gas dynamics problem of the interaction of a shock wave with a counter-propagating simple rarefaction wave often referred to as the shock wave refraction.
A.M. Leszczyszyn   +59 more
core   +5 more sources

Effect of heavy metals (Ni, Cu, Pb) doped ZnO on the nonlinear optical properties

open access: yesMaterials Research Express, 2020
In this paper, the non-linear optical properties of undoped and doped ZnO thin films were investigated. The films were doped with Ni, Pb, and Cu. an increase in the refractive index against wavelength is apparent for all films up to a certain value of ...
Abeer Salah, Ahmed A Aboud, A M Saad
doaj   +1 more source

Sensitivity optical non-linear measurement based on wide-band phase objects

open access: yesFrontiers in Materials, 2023
On the basic that the phase object (PO) is the key optical device in the 4f imaging system, a modified high sensitivity optical nonlinear measurement technique with an absorptive homemade phase object (HPO) is reported in order to characterize the value ...
Zhangyang Shao   +9 more
doaj   +1 more source

Figure of merit for design of ε-near-zero metamaterials with enhanced Kerrtype nonlinearities [PDF]

open access: yesEPJ Web of Conferences, 2023
Metamaterials are artificial media designed to display properies going beyond those of ordinary materials. Particularly interesting are ε-near-zero (ENZ) media with real part of the permittivity going to zero in a certain spectral range.
Dodici Francesca   +3 more
doaj   +1 more source

Scattering of Solitons and Dark Solitons by Potential Walls in the Nonlinear Schroedinger Equation [PDF]

open access: yes, 2004
Scattering of solitons and dark solitons by potential walls is studied in the nonlinear Schroedinger equation under various conditions. We investigate the conditions under which solitons are split into two solitons at the potential wall.
Sakaguchi, Hidetsugu, Tamura, Mitsuaki
core   +1 more source

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