Results 61 to 70 of about 198,874 (293)

Diffraction of a Gaussian beam near the beam waist

open access: yesJournal of the European Optical Society-Rapid Publications, 2019
The behavior of the light field near the beam waist has attracted considerable attention due to the studies of the light spin-orbit interaction: it’s manifestation as well as potential applications.
Evelina A Bibikova   +2 more
doaj   +1 more source

Efficient generation of broadband MIR radiation by difference–frequency generation in LiGaS2 [PDF]

open access: yesEPJ Web of Conferences, 2019
We report a surprisingly infrared (MIR) pulse generation in simultaneous interplay of intra-pulse self-phase-modulation and dispersion. broadband and efficient middle-LiGaS2 (LGS) by invoking a difference frequency generation,
Chen Bo-Han, Nagy Tamas, Baum Peter
doaj   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

open access: yesAdvanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal   +2 more
wiley   +1 more source

Spatially Variable Ripple and Groove Formation on Gallium Arsenide Using Linear, Radial, and Azimuthal Polarizations of Laser Beam

open access: yesPhotonics
We demonstrated the linear, radial, and annular ripple formation on the surface of GaAs. The formation of linear ripples was optimized by the number of shots and the fluence of 30 ps, 532 nm pulses.
Kalvis Kalnins   +4 more
doaj   +1 more source

Nonlinear Optical Effects [PDF]

open access: yes, 1971
Third-harmonic generation in cholesteric liquid crystals, far-infrared generation by ultrashort pulses, and self-focusing of light in nonlinear media are taken as examples for illustration of nonlinear optical effects. Depending on the problems, different approximations are used in solving the nonlinear wave equations.
openaire   +3 more sources

Solid‐State Diffusion and Intermetallic Phase Formation in Roll‐Bonded Mg–Zn Composites With Kirigami‐Patterned Inlay

open access: yesAdvanced Engineering Materials, EarlyView.
Mg–Zn composites with a thickness of 0.21 mm were fabricated using roll bonding of a kirigami‐patterned Mg alloy inlay within a Zn matrix. Thermal activation following this process led to the formation of tailored intermetallic structures, which provided the composite with enhanced flexural strength.
Yaroslav Frolov   +4 more
wiley   +1 more source

Nonlinear optics in ultra-silicon-rich nitride devices: recent developments and future outlook

open access: yesAdvances in Physics: X, 2021
Nonlinear integrated optics leveraging platforms with high nonlinear figure of merit offer energy efficient optical signal processing capabilities. Over the last five years, CMOS-compatible ultra-silico-rich nitride (USRN) has emerged as a promising ...
Dawn T. H. Tan   +8 more
doaj   +1 more source

Multiphoton Quantum Optics and Quantum State Engineering

open access: yes, 2006
We present a review of theoretical and experimental aspects of multiphoton quantum optics. Multiphoton processes occur and are important for many aspects of matter-radiation interactions that include the efficient ionization of atoms and molecules, and ...
Abbas   +735 more
core   +1 more source

High‐Temperature Nanoindentation of Metals: Assessing Thermal Drift, Frame Compliance, and Chemical Composition Effects on the Reported Mechanical Properties

open access: yesAdvanced Engineering Materials, EarlyView.
Do not let thermal drift and instrument artifacts deceive high‐temperature nanoindentation results. We compare classical Oliver–Pharr and automatic image recognition analyses across steels and a Ni alloy to quantify these effects. Accounting for artifacts reveals systematic softening with temperature, while Cr and Ni additions boost resistance ...
Velislava Yonkova   +2 more
wiley   +1 more source

On the blow-up threshold for weakly coupled nonlinear Schroedinger equations

open access: yes, 2007
We study the Cauchy problem for a system of two coupled nonlinear focusing Schroedinger equations arising in nonlinear optics. We discuss when the solutions are global in time or blow-up in finite time.
Fanelli, Luca, Montefusco, Eugenio
core   +1 more source

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