Results 31 to 40 of about 68,410 (312)
Optical trapping with a perfect vortex beam
, 2014 The authors would like to thank the UK Engineering and Physical Sciences Research Council (EPSRC) for funding.Vortex beams with different topological charge usually have different profiles and radii of peak intensity.
Arita, Yoshihiko +9 more
core +1 more source
All-optical mode conversion via spatially multimode four-wave mixing
New Journal of Physics, 2016 We experimentally demonstrate the conversion of a Gaussian beam to an approximate Bessel–Gauss mode by making use of a non-collinear four-wave mixing (4WM) process in hot atomic vapor.
Onur Danaci +2 more
doaj +1 more source
FEBS Open Bio, EarlyView.Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley +1 more source
GAUSSIAN PROBE BEAM WITH HIGH SPHERICAL ABERRATION FOR REFRACTIVE INDEX MEASUREMENTS IN LIQUID SAMPLES. AN APPLICATION TO GLUCOSE CONCENTRATION [PDF]
, 2020 "This thesis introduce a highly sensitive optical technique to measure refractive indexes of liquid transparent or turbid samples, based on measuring the heights of the primary side-lobes of the normalized intensity profiles of a focused Gaussian beam ...
Etna Yáñez
core
Single kick approximations for beam-beam deflections
Physical Review Special Topics. Accelerators and Beams, 1999 A six-dimensional symplectic beam-beam interaction map using finite discrete slices of a strong beam is extended to infinitesimal slices. The new map is calculated under the assumption of a longitudinal Gaussian distribution with approximations.
Takahiko Koyama
doaj +1 more source
Effect of terahertz irradiation on DNA damage repair in living cells
FEBS Open Bio, EarlyView.We investigated the effect of terahertz (THz) wave irradiation on DNA double‐strand break (DSB) repair in living cells. We found that THz irradiation enhanced DSB repair at specific frequencies, whereas heat treatment inhibited it, indicating that this effect is nonthermal and frequency‐specific.
Yuya Ueno +3 more
wiley +1 more source
Nonparaxial Propagation of Vectorial Elliptical Gaussian Beams
International Journal of Optics, 2016 Based on the vectorial Rayleigh-Sommerfeld diffraction integral formulae, analytical expressions for a vectorial elliptical Gaussian beam’s nonparaxial propagating in free space are derived and used to investigate target beam’s propagation properties. As
Wang Xun +3 more
doaj +1 more source
Self-accelerating and self-healing of Ince-Gaussian-like beams
Results in Physics, 2022 The propagation of a new type of Ince-Gaussian-like beam along a predesigned parabolic trajectory in the free space is investigated numerically and experimentally.
Haobin Yang +10 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt +8 more
wiley +1 more source
Incoherent beam combination of higher-order Gaussian beam in atmospheric turbulence
Results in OpticsIn this article, an incoherent beam combination of higher-order Gaussian beams through atmospheric turbulence is studied. An analytical expression of the combined intensity and spot size of higher-order Gaussian beams such as Hermite Gaussian (HG ...
Mukesh Kumar +3 more
doaj +1 more source