Results 111 to 120 of about 28,100 (290)

Highly-accurate manipulation of focal length for circular Airy beams

npj Nanophotonics
The existing excitation models for circular Airy beams suffer from focal length deviation, which reduces the positioning accuracy of the focal point.
JingYing Zhang, Wei Zhang, Wei Li, HuiJie Ren, ZhaoWu Liu, WenHao Li   +5 more
doaj   +1 more source

Miniature meta-device for dynamic control of Airy beam

Opto-Electronic Advances
Dynamic control of Airy beam has been attracting scientists’ attention due to its potential applications in imaging, optical manipulation and laser manufacturing.
Qichang Ma, Guixin Li
doaj   +1 more source

Closed-form expressions for nonparaxial accelerating beams with pre-engineered trajectories

, 2015
In this letter, we propose a general real-space method for the generation of nonparaxial accelerating beams with arbitrary predefined convex trajectories. Our results lead to closed-form expressions for the required phase at the input plane.
Efremidis, Nikolaos K., Paltoglou, Vassilis, Penciu, Raluca-Sorina   +2 more
core   +1 more source

Fatigue Crack Initiation and Growth in Nanocrystalline Ni at Multiple Length‐Scales

Advanced Engineering Materials, EarlyView.
Overview of miniaturized in situ SEM fatigue setup and resultant fatigue crack growth data for nanocrystalline Ni. The presented study focuses on the analysis of fatigue crack growth rate (FCGR) in focused ion beam‐notched microcantilevers prepared from nanocrystalline (NC) Ni as a model material.
Igor Moravcik, Alexander Jelinek, Markus Alfreider, Jutta Luksch, Anton Hohenwarter, Florian Schaefer, Christian Motz, Daniel Kiener   +7 more
wiley   +1 more source

The Hydrogen Epoch of Reionization Array Dish I: Beam Pattern Measurements and Science Implications

, 2016
The Hydrogen Epoch of Reionization Array (HERA) is a radio interferometer aiming to detect the power spectrum of 21 cm fluctuations from neutral hydrogen from the Epoch of Reionization (EOR).
Aguirre, James E., Ali, Zaki S., Bowman, Judd, Bradley, Richard F., Cheng, Carina, DeBoer, David R., Dickenson, Roger, Dillon, Joshua S., Doolittle, Phillip, Egan, Dennis, Ewall-Wice, Aaron, Hedrick, Mike, Hewitt, Jacqueline N., Jacobs, Daniel C., Klima, Patricia J., Kohn, Saul A., Moodley, Kavilan, Neben, Abraham R., Parsons, Aaron R., Patra, Nipanjana, Saliwanchik, Benjamin R. B., Schaffner, Patrick, Shelton, John, Taylor, H. A., Taylor, Rusty, Tegmark, Max, Thyagarajan, Nithyanandan, Wirt, Butch, Zheng, Haoxuan   +28 more
core   +1 more source

Copper Nanocrystallization in Anodic Oxide Films of Ti–Cu‐Based Bulk Metallic Glass and Its Effect on the Corrosion Resistance and Cytocompatibility

Advanced Engineering Materials, EarlyView.
Viktoriia Shtefan, Thorgund Nemec, Ute Hempel, Annett Gebert and coworkers demonstrate that anodic treatment of Ti–Cu‐based metallic glass in a nontoxic pyrophosphate electrolyte forms a protective bilayered Ti/Zr‐oxide film enriched with Cu nanocrystals.
Viktoriia Shtefan, Nora Fernández Navas, Thorgund Nemec, Ivan Kaban, Ute Hempel, Andrea Voss, Volker Hoffmann, Darius Pohl, Annett Gebert   +8 more
wiley   +1 more source

Accelerating Airy Beams Along Tunable Propagation Trajectories

IEEE Photonics Journal, 2017
We present a simple and highly efficient approach to directly generate tunable Airy beams, which can propagate along arbitrary monotonic curves. Such beams are generated by modulating a Gaussian beam imposed by tunable phase-only patterns.
Yixian Qian, Liangwei Dong, Hongxing Mao
doaj   +1 more source

Airy Beam-enabled Binary Acoustic Metasurfaces for Underwater Ultrasound Beam Manipulation. [PDF]

Phys Rev Appl, 2022
Hu Z, Yang Y, Xu L, Jing Y, Chen H.
europepmc   +1 more source

Spatiotemporal diffraction-free pulsed beams in free-space of the Airy and Bessel type

, 2017
We investigate the dynamics of spatiotemporal optical waves with one transverse dimension that are obtained as the intersections of the dispersion cone with a plane.
Efremidis, Nikolaos K.
core   +1 more source

Intermolecular Interactions as Driving Force of Increasing Multiphoton Absorption in a Perylene Diimide‐Based Coordination Polymer

Advanced Functional Materials, EarlyView.
This study uncovers the unexplored role of intermolecular interactions in multiphoton absorption in coordination polymers. By analyzing [Zn2tpda(DMA)2(DMF)0.3], it shows how the electronic coupling of the chromophores and confinement in the MOF enhance two‐and three‐photon absorption.
Simon Nicolas Deger, Anna Mauri, Yang Cui, Sebastian Josef Weishäupl, Ali Deniz Özdemir, Hamad Syed, Aleksandr Ovsianikov, Wolfgang Wenzel, Alexander Pöthig, Jürgen Hauer, Mariana Kozlowska, Roland Augustinus Fischer   +11 more
wiley   +1 more source