Results 131 to 140 of about 7,684 (263)
Numerical studies of vortices and dark solitons in atomic Bose-Einstein condensates [PDF]
, 2004 Dilute atomic Bose-Einstein condensates support intriguing macroscopic excitations in the form of quantized vortices and dark solitons. In this thesis we present extensive quantitative studies of the dynamics of these phenomena in the limit of zero ...
Parker, Nicholas
core
Tuning vector vortex in spatially coherent supercontinuum multicolored optical beam using q-plate
, 2014 Tuning vector vortex in spatially coherent multicolored beam is studied. A wavelength filter based on the tunable modal properties of light is experimentally demonstrated, and the polarization topology of optical beam profile is mapped.
Sebastiao Pratavieira +10 more
core +1 more source
Photothermal‐Activated Antibacterial Amyloid‐Polyphenol‐Iron Hydrogels for Synergistic Wound Healing
Advanced Healthcare Materials, EarlyView.We report a thermally triggered supramolecular hydrogel (LTFe) formed by Fe3+ and tannic acid on lysozyme amyloid fibrils. Fe3+ enables rapid gelation and photothermal transduction with an efficiency of 88.56%. The LTFe hydrogel exhibits excellent biocompatibility, potent antibacterial activity against E. coli and S.
Di Wu +8 more
wiley +1 more source
Scientific ReportsThis paper examines spatially dependent absorption and gain of a weak probe field in a 3-level atomic $$\Lambda$$ -system with spontaneously generated coherence and incoherent pump, using an optical vortex beam as the control field.
Viačeslav Kudriašov +3 more
doaj +1 more source
Vortex structures in atomic spin-1 Bose-Einstein condensates
, 2013 This thesis is concerned with the structure and stability of vortices in spin-1 atomic Bose-Einstein Condensates (BECs) in rotating, optical traps. We numerically study these vortex structures using a classical mean-field theory which allows atomic ...
Lovegrove, Justin
core
Advanced Healthcare Materials, EarlyView.Gonzalez Martinez and collaborators develop a strategy to formulate high performance GelMA‐based bioinks with low solids contents. The resulting bioinks enable 3D bioprinting at 37 °C of high‐fidelity structures with tunable mechanical properties that support high cell viability and function.
David A. González‐Martínez +8 more
wiley +1 more source
Probing the modal characteristics of novel beam shapes
, 2013 In this thesis, an investigation into the modal characteristics of novel beam shapes is presented. Sculpting the phase profile of a Gaussian beam can result in the generation of a beam with unique properties.
Mourka, Areti
core
Orbital angular momentum in noncollinear second-harmonic generation by off-axis vortex beams
, 2011 We experimentally study the behavior of orbital angular momentum (OAM) of light in a noncollinear second-harmonic generation process. The experiment is performed by using a Type I BBO crystal under phase-matching conditions with femtosecond pumping ...
BRACCINI, MATTEO +5 more
core +1 more source
Plasmonic Enhancement of Fluorescence and Protein Dynamics in Living Mammalian Cells
Advanced Materials, EarlyView.This study demonstrates plasmonic enhancement of the function of fluorescent voltage sensing proteins (genetically encoded voltage indicators, (GEVIs), QuasAr6) in live mammalian cells. Coupling to plasmonic nanoparticles does not just increase fluorescence, but influences the protein photocycle, creating a hybrid sensor with its response speed to ...
Marco Locarno +16 more
wiley +1 more source
Giant Vortex Dichroism in Simplified-Chiral-Double-Elliptical Metamaterials
NanomaterialsVortex dichroism in chiral metamaterials is of great significance to the study of photoelectric detection, optical communication, and the interaction between light and matter.
Shiqi Luo +3 more
doaj +1 more source