Results 51 to 60 of about 39,722 (316)

Truncation of the series expressions in the advanced ENZ-theory of diffraction integrals [PDF]

open access: yesJournal of the European Optical Society-Rapid Publications, 2014
The point-spread function (PSF) is used in optics for design and assessment of the imaging capabilities of an optical system. It is therefore of vital importance that this PSF can be calculated fast and accurately.
van Haver S., Janssen A. J. E. M.
doaj   +1 more source

Matrix Wiener-Hopf factorisation II [PDF]

open access: yes, 1984
A direct method is described for effecting the explicit Wiener-Hopf factorisation of a class of (2 x 2}—matrices. The class is determined such that the factorisation problem can be reduced to a matrix Hilbert problem which involves an upper or lower ...
Rawlins, A D
core   +1 more source

Exploring Dipolar Dynamics and Ionic Transport in Metal‐Organic Frameworks: Experimental and Theoretical Insights

open access: yesAdvanced Functional Materials, EarlyView.
In this study, the interplay of dipolar dynamics and ionic charge transport in MOF compounds is investigated. Synthesizing the novel structure CFA‐25 with integrated freely rotating dipolar groups, local and macroscopic effects, including interactions with Cs cations are explored.
Ralph Freund   +6 more
wiley   +1 more source

Diffraction-Attenuation Resistant Beams: their Higher Order Versions and Finite-Aperture Generations

open access: yes, 2010
Recently, a method for obtaining diffraction-attenuation resistant beams in absorbing media was developed through suitable superposition of ideal zero-order Bessel beams. In this work, we will show that such beams maintain their resistance to diffraction
Besieris   +27 more
core   +1 more source

Axial plane optical microscopy. [PDF]

open access: yes, 2014
We present axial plane optical microscopy (APOM) that can, in contrast to conventional microscopy, directly image a sample's cross-section parallel to the optical axis of an objective lens without scanning.
Kim, Jeongmin   +6 more
core   +2 more sources

Photoswitchable Conductive Metal–Organic Frameworks

open access: yesAdvanced Functional Materials, EarlyView.
A conductive material where the conductivity can be modulated remotely by irradiation with light is presented. It is based on films of conductive metal–organic framework type Cu3(HHTP)2 with embedded photochromic molecules such as azobenzene, diarylethene, spiropyran, and hexaarylbiimidazole in the pores.
Yidong Liu   +5 more
wiley   +1 more source

Multi-Wavelength Angle-Resolved Scattering of Randomly Rough Surfaces Based on the Scalar Diffraction Theory [PDF]

open access: gold, 2023
Václav Šulc   +6 more
openalex   +1 more source

Understanding and Optimizing Li Substitution in P2‐Type Sodium Layered Oxides for Sodium‐Ion Batteries

open access: yesAdvanced Functional Materials, EarlyView.
This work explores Li‐substituted P2 layered oxides for Na‐ion batteries by crystallographic and electrochemical studies. The effect of lithium on superstructure orderings, on phase transitions during synthesis and electrochemical cycling and on the interplay of O‐ versus TM‐redox is revealed via various advanced techniques, including semi‐simultaneous 
Mingfeng Xu   +5 more
wiley   +1 more source

Gradient method for designing cascaded DOEs focusing radiation of different wavelengths

open access: yesКомпьютерная оптика
The design of cascaded diffractive optical elements (DOEs) generating several specified intensity distributions for several incident beams with different wavelengths is considered.
G.A. Motz   +5 more
doaj   +1 more source

Topological polarization singularities in metaphotonics

open access: yesNanophotonics, 2021
Polarization singularities of vectorial electromagnetic fields locate at the positions where properties of polarization ellipses are not defined. First observed for conical diffraction in 1830s, polarization singularities have been studied systematically
Liu Wenzhe   +3 more
doaj   +1 more source

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