Results 101 to 110 of about 221,879 (297)

Measurement accuracies in band-limited extrapolation [PDF]

The problem of numerical instability associated with extrapolation algorithms is addressed. An attempt is made to estimate the bounds for the acceptable errors and to place a ceiling on the measurement accuracy and computational accuracy needed for the ...
Kritikos, H. N.
core   +1 more source

External Reflection From Two‐Photon Laser‐Printed Micromirrors Enables Photomechanical Actuation at a 90° Incident Angle

Advanced Functional Materials, EarlyView.
Light reflectance increases along incidence angle and transmittance significantly drops around 90‐degree incidence angle. Here, we report two‐photon laser printed micro mirrors that redirect the skimming light beam into normal light absorption. Using this technique, light‐driven micro walkers and grippers are demonstrated by using grazing incidence ...
Leilei Song, Jianfeng Yang, Hao Zeng
wiley   +1 more source

Implantable Micro-optics for label-free non-linear imaging [PDF]

EPJ Web of Conferences
Non-linear excitation microscopy offers superior in-vivo imaging but faces challenges in deep tissue. High numerical aperture beams suffer spherical aberrations, while tissue scattering impacts image quality.
Marini Mario, Panzeri Davide, Nardini Alessandra, Kariman Behjat S., Conci Claudio, Sironi Laura, Inverso Donato, Jacchetti Emanuela, Martinez Vázquez Rebeca, Osellame Roberto, Collini Maddalena, Cerullo Giulio, Raimondi Manuela Teresa, Kabouraki Elmina, Farsari Maria, Kehaghias Nikos, Tourlouki Konstantina, Chirico Giuseppe   +17 more
doaj   +1 more source

3D-printed multilayer structures for high-numerical aperture achromatic metalenses. [PDF]

Sci Adv, 2023
Pan CF, Wang H, Wang H, S PN, Ruan Q, Wredh S, Ke Y, Chan JYE, Zhang W, Qiu CW, Yang JKW.   +10 more
europepmc   +1 more source

An optimal filter for the detection of galaxy clusters through weak lensing

, 2004
We construct a linear filter optimised for detecting dark-matter halos in weak-lensing data. The filter assumes a mean radial profile of the halo shear pattern and modifies that shape by the noise power spectrum.
Bartelmann, Bartelmann, Bartelmann, Cooray, Dolag, Eke, Erben, Erben, Haehnelt, Herranz, Herranz, Hu, Jenkins, K. Dolag, L. Moscardini, Li, M. Bartelmann, M. Maturi, M. Meneghetti, Maturi, Meneghetti, Meneghetti, Meneghetti, Meneghetti, Miralles, Navarro, Sanz, Schirmer, Schneider, Schneider, Seljak, Springel, Tegmark, Tormen, Wright, Yoshida   +35 more
core   +1 more source

Novel Functional Materials via 3D Printing by Vat Photopolymerization

Advanced Functional Materials, EarlyView.
This Perspective systematically analyzes strategies for incorporating functionalities into 3D‐printed materials via Vat Photopolymerization (VP). It explores the spectrum of achievable functionalities in recently reported novel materials—such as conductive, energy‐storing, biodegradable, stimuli‐responsive, self‐healing, shape‐memory, biomaterials, and
Sergey S. Nechausov, Patrick Fesser, Boris A. Bulgakov, Ulrich S. Schubert   +3 more
wiley   +1 more source

Negative result of multi-frequency topological derivative based imaging in limited-aperture inverse scattering problem

Results in Physics, 2016
A negative result of topological derivative based imaging of thin, rectangular shaped inhomogeneity with the least range of incident directions was obtained.
Won-Kwang Park
doaj   +1 more source

Spin Defects in Hexagonal Boron Nitride as 2D Strain Sensors

Advanced Functional Materials, EarlyView.
We demonstrate that boron‐vacancy (VB${\rm V}_{\rm B}$) centers in hexagonal boron nitride (hBN) enable quantitative strain sensing with sub‐micrometer resolution. Using this approach under continuously tunable in‐plane stress, we precisely quantify strain‐induced shifts of the E2g${\rm E}_{2{\rm g}}$ Raman mode in multilayer hBN, establishing VB${\rm ...
Zhao Mu, Zhaowei Zhang, Jules Fraunié, Cédric Robert, Grégory Seine, Bernard Gil, Guillaume Cassabois, Vincent Jacques   +7 more
wiley   +1 more source

Self‐Hybridized Exciton‐Polariton Photodetectors From Layered Metal‐Organic Chalcogenolates

Advanced Functional Materials, EarlyView.
Self‐hybridized exciton‐polariton photodetectors are demonstrated using high refractive index mithrene, eliminating the need for top mirrors. This simplified architecture enables tunable sub‐bandgap photodetection via lower exciton‐polariton states and enhanced carrier transport through ultrafast polariton group velocities.
Bongjun Choi, Adam D. Alfieri, Wangleong Chen, Deep Jariwala   +3 more
wiley   +1 more source

Polarization-independent achromatic Huygens' metalens with large numerical aperture and broad bandwidth. [PDF]

Nanophotonics, 2023
He X, Qi C, Lei S, Wong AMH.
europepmc   +1 more source