Results 21 to 30 of about 6,930 (295)
Nanomaterials, 2021 InP@ZnS core-shell colloidal quantum dots (CQDs) were synthesized and characterized using the z-scan technique. The nonlinear refraction and nonlinear absorption coefficients (γ = −2 × 10−12 cm2 W−1, β = 4 × 10−8 cm W−1) of these CQDs were determined ...
Rashid A. Ganeev +5 more
doaj +1 more source
Investigation of Nonlinear Optical Processes in Mercury Sulfide Quantum Dots
Nanomaterials, 2022 The authors report the third-harmonic generation, nonlinear refraction, and nonlinear absorption in HgS quantum dot (QD) suspensions and films using the nanosecond and femtosecond pulses.
Vyacheslav V. Kim +10 more
doaj +1 more source
Ultrafast Broadband Nonlinear Optical Response in Co-Doped Sb2Se3 Nanofilms at Near-Infrared
Frontiers in Materials, 2021 Transition metal-doped Sb2Se3 has become a heated topic caused by the strong nonlinear optical response and the ultrafast response time at high laser excitation.
Di Sun +5 more
doaj +1 more source
Conical refraction and nonlinearity
Optics Express, 2006 We study conical refraction in crystals where both diffraction and nonlinearity are present. We develop a new set of evolution equations. We find that nonlinearity induces a modulational instability when it is defocussing as well as focussing. We also examine the evolution of incident beams which contain analytic singularities, and in particular ...
R A, Indik, A C, Newell
openaire +2 more sources
Nanophotonics, 2021 Bismuth telluride nanoparticles (NPs) attract attention due to the growth of sensitivity of the Bi2Te3 NPs-containing registrars in the near- and mid-infrared ranges.
Ganeev Rashid A. +9 more
doaj +1 more source
Direct observation of an irradiance dependent nonlinear refraction in CVD single layer graphene [PDF]
, 2021 The nonlinear optical properties of single layer graphene are studied via Z-scan. The measurements are carried out at 1045 nm with a 360 femtosecond highly stable Yb doped mode-locked fiber laser.
Demetriou, G. +6 more
core +1 more source
Graphene’s nonlinear-optical physics revealed through exponentially growing self-phase modulation
Nature 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]
Nonlinear 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
Accurate determination of nonlinear refraction in ZnO and Au composite nanostructures
, 2020 It is now well established that the nonlinear optical properties of ZnO nanoparticles can be significantly enhanced by coupling them to metallic nanoparticles.
Fernando, Joseph FS +3 more
core +1 more source
Nonlinear Optical Properties of CdSe and CdTe Core-Shell Quantum Dots and Their Applications
Frontiers 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