Results 81 to 90 of about 43,576 (316)

Substrate Stress Relaxation Regulates Cell‐Mediated Assembly of Extracellular Matrix

Advanced Functional Materials, EarlyView.
Silicone‐based viscoelastic substrates with tunable stress relaxation reveal how matrix mechanics regulates cellular mechanosensing and cell‐mediated matrix remodelling in the stiff regime. High stress relaxation promotes assembly of fibronectin fibril‐like structures, increased nuclear localization of YAP and formation of β1 integrin‐enriched ...
Jonah L. Voigt, Jens Timmer, Elisabetta Ada Cavalcanti‐Adam   +2 more
wiley   +1 more source

Coaxial superposition of Bessel beams by discretized spiral axicons

Journal of the European Optical Society-Rapid Publications, 2018
Background A diffractive spiral axicon can be used for the generation of a vortex beam with orbital angular momentum. The coaxial superposition of multiple vortices can generate a complex field with off-axis optical vortices.
Stephanie Supp, Jürgen Jahns
doaj   +1 more source

Direct fiber vector eigenmode multiplexing transmission seeded by integrated optical vortex emitters [PDF]

, 2017
Spatial modes have received substantial attention over the last decades and are used in optical communication applications. In fiber-optic communications, the employed linearly polarized modes and phase vortex modes carrying orbital angular momentum can ...
Cai, Xin-Lun, Chen, Shi, Du, Cheng, Klitis, Charalambos, Li, Shi-Mao, Liu, Jun, Mo, Qi, Sorel, Marc, Wang, An-Dong, Wang, Jian, Yu, Si-Yuan, Zhu, Long   +11 more
core   +1 more source

Perfect spatiotemporal optical vortices

Photonics Research
Recently, spatiotemporal optical vortices (STOVs) with transverse orbital angular momentum have emerged as a significant research topic. While various STOV fields have been explored, they often suffer from a critical limitation: the spatial and temporal dimensions of the STOV wavepacket are strongly correlated with the topological charge.
Haihao Fan, Qian Cao, Xin Liu, Andy Chong, Qiwen Zhan   +4 more
openaire   +2 more sources

Clean‐Limit 2D Superconductivity in a Thick Exfoliated Kagome Film

Advanced Functional Materials, EarlyView.
This study reports clean‐limit 2D superconductivity in a thick kagome system, analogous to the 3D case. It observes a drop in superfluid stiffness near the superconducting transition and a cusp‐like feature in the angular dependence of the upper critical field.
Fei Sun, Andrea Capa Salinas, Stephen D. Wilson, Haijing Zhang   +3 more
wiley   +1 more source

Observation of higher-order deterministic optical vortices from random vortex beams

APL Photonics
Optical vortices in coherent beams have been identified as spiral phases with intensity nulls at singularities, while in random beams, they appear as coherence vortices in correlation functions, often not matching intensity nulls. Observing deterministic
Yonglei Liu, Siyu Xu, Peipei Peng, Yongtao Zhang, Siting Dai, Yahong Chen, Yangjian Cai, Fei Wang   +7 more
doaj   +1 more source

Microoptomechanical pumps assembled and driven by holographic optical vortex arrays

, 2004
Beams of light with helical wavefronts can be focused into ring-like optical traps known as optical vortices. The orbital angular momentum carried by photons in helical modes can be transferred to trapped mesoscopic objects and thereby coupled to a ...
Allen, Arlt, Ashkin, Blake, Bousse, Curtis, Curtis, David G. Grier, Dufresne, Dufresne, Friese, Gahagan, Garces-Chavez, He, He, Kosta Ladavac, Liron, O’Neil, Simpson, Terray, Unger   +20 more
core   +1 more source

Microporous Microgel Assemblies Facilitating the Recruitment and Osteogenic Differentiation of Progenitor Cells for Bone Regeneration

Advanced Functional Materials, EarlyView.
There is a significant need for biomaterials with well‐defined stability and bioactivity to support tissue regeneration. In this study, we developed a tunable microgel platform that enables the decoupling of stiffness from porosity, thereby promoting bone regeneration.
Silvia Pravato, Haishuo Guan, Bianca M. Carrara, Mira Jacobs, Matteo Monticelli, Lukas Moser, Thomas Moragues, Andrew J. deMello, Tomaso Zambelli, Martin Ehrbar   +9 more
wiley   +1 more source

Vortices in Bose-Einstein Condensates: Some Recent Developments

, 2004
In this brief review we summarize a number of recent developments in the study of vortices in Bose-Einstein condensates, a topic of considerable theoretical and experimental interest in the past few years.
Abdullaev F. K., Abrikosov A. A., Alfimov G. L., Aranson I. S., Berloff N. G., Butts D. A., Carretero-González R., Choi S., D. J. FRANTZESKAKIS, Deconinck B., Deconinck B., Denschlag J. H., Donnelly R. J., Einstein A., Einstein A., Frantzeskakis D. J., García-Ripoll J. J., I. G. KEVREKIDIS, Kevrekidis P. G., Kevrekidis P. G., Kevrekidis P. G., Kevrekidis P. G., Kevrekidis P. G., Kivshar Yu. S., Lifshitz E. M., Malomed B. A., Möttönen M., P. G. KEVREKIDIS, Pitaevskii L. P., Potasek M. J., R. CARRETERO-GONZÁLEZ, Sulem C., Tempere J., Tkachenko V. K., Trippenbach M., Williams J. E., Wu B.   +36 more
core   +1 more source

Symmetry and Quantum Features in Optical Vortices [PDF]

, 2021
Davıd L. Andrews
openalex   +1 more source