Results 91 to 100 of about 588,216 (289)

Survey of Crystal Singular Optics [PDF]

, 2019
Among the various directions modern optics has taken to develop applications for optical nano-tweezer and nano-manipulator designs, one that stands out is the use of singular optics approaches to anisotropic media. It is well known that singular optics deals with light beams that support wavefront edge dislocations and optical vortices (screw ...
Chen Zhebo, Steen G. Hanson, Claudia Y. Zenkova, Bin Guo, Oleg V. Angelsky   +4 more
openaire   +1 more source

Instantaneous field singularities in electromagnetic waves

New Journal of Physics, 2018
Singularities, i.e. places of discontinuity of physical parameters are extremely general objects appearing in both stationary and wave processes. They commonly occur in purely coherent, highly directional electromagnetic waves, such as laser beams ...
Vladlen Shvedov, Wieslaw Krolikowski
doaj   +1 more source

Bioinspired Co‐Assembly Enables Multiscale Architected Hydrogels for 3D Printing With Integrated Antibacterial and Bioactive Functions

Advanced Functional Materials, EarlyView.
A multicomponent supramolecular hydrogel integrating cell‐adhesive and antibacterial peptides within an alginate‐cellulose nanofibril matrix is developed. Peptide co‐assembly simultaneously strengthens the hydrogel network, improves extrusion printability, and imparts cell‐adhesive and antibacterial functions, offering a versatile platform for ...
Mor Tsuriano‐Zernichov, Francesca Netti, Sigal Rencus‐Lazar, Moran Aviv, Lihi Adler‐Abramovich   +4 more
wiley   +1 more source

SINGULAR RANDOM MATRIX DECOMPOSITIONS: DISTRIBUTIONS. [PDF]

Assuming that Y has a singular matrix variate elliptically contoured distribution with respect to the Hausdorff measure, the distributions of several matrices associated to QR, modified QR, SV and Polar decompositions of matrix Y are determined, for ...
Graciela González-Farías, José A. Díaz-García   +1 more
core  

Singular Higher Order Divergence-Conforming Bases of Additive Kind and Moments Method Applications to 3D Sharp-Wedge Structures [PDF]

, 2008
We present new subsectional, singular divergence conforming vector bases that incorporate the edge conditions for conducting wedges. The bases are of additive kind because obtained by incrementing the regular polynomial vector bases with other ...
GRAGLIA, Roberto, Graglia R.D, Lombardi, Guido   +2 more
core   +1 more source

Coordinated Architectural and Chemical Reinforcement in the Crushing Mandible of a Soldier Termite

Advanced Functional Materials, EarlyView.
The crushing mandible of a soldier termite withstands substantial biting loads despite lacking mineral. Its cuticle is partitioned: convex teeth pair hardness and zinc enrichment with aligned chitin fibers for contact durability, while stiffer concave regions between teeth carry bending loads.
Andrew Tran Nguyen, Patryk Wąsik, Juan Fernando Cucuyame Morales, Marie Kate Palau, Adrian Francisco Duran Ornelas, Phani Saketh Dasika, Jin Hee Kim, Radhika Laxminarayana, Eric Hintsala, Greta Chang, Junzhi Liao, Lizhi Sun, Nathan Lord, Atsushi Arakaki, Paul Bardunias, Pablo Zavattieri, David Kisailus   +16 more
wiley   +1 more source

Correlation and singular optics for diagnostics of structured light and condensed matter: time-stationary and spatio-temporal approaches

Frontiers in Physics
The review describes the principles and examples of practical realization of diagnostic approaches based on the coherence theory, optical singularities and interference techniques. The presentation is based on the unified correlation-optics and coherence-
O. V. Angelsky, O. V. Angelsky, A. Y. Bekshaev, P. P. Maksimyak, I. I. Mokhun, C. Y. Zenkova, C. Y. Zenkova, V. Y. Gotsulskiy, D. I. Ivanskyi, Jun Zheng   +9 more
doaj   +1 more source

Light‐Induced Field‐Tunneling Synapses in Solution‐Processed Van Der Waals Heterostructures for Scalable, Retina‐Inspired Optical Sensing

Advanced Functional Materials, EarlyView.
A scalable, solution‐processed WSe2/ZrO2‐x van der Waals heterostructure realizes a light‐induced field‐tunneling synapse (LIFTS) that activates exclusively under bright illumination, emulating the photopic adaptation of the human retina at the device level.
Kijeong Nam, Jihyun Kim, Soobeen Ji, In Soo Kim, Sejin Kim, Eungseon Yeon, Do Kyung Hwang, Iva Plutnarová, Zdeněk Sofer, Sang Min Won, Joohoon Kang   +10 more
wiley   +1 more source

Butterfly Optics Exceed the Theoretical Limits of Conventional Apposition Eyes [PDF]

, 1987
Optical experiments on butterfly compound eyes show that they have angular sensitivities narrower than expected from conventional apposition eyes. This superior performance is explained by a theoretical model where the cone stalk is considered as a ...
Nilsson, D.-E.,, Nilsson, D.-E., Hateren, J.H. van, Hateren, J.H. van,   +3 more
core   +2 more sources

Generation of Propagation-Dependent OAM Self-Torque with Chirped Spiral Gratings

Photonics
The application of non-uniform spiral gratings to control the structure, topological parameters and propagation of orbital angular momentum (OAM) beams was studied experimentally with coherent near-infrared light.
Ruediger Grunwald, Mathias Jurke, Max Liebmann, Alexander Treffer, Martin Bock   +4 more
doaj   +1 more source