Results 61 to 70 of about 5,049 (222)

Analysis of spectral chirps and intensities evolution of a spatiotemporally focused femtosecond laser beam

Results in Physics, 2017
Spatiotemporal focusing, or simultaneous spatial and temporal focusing (SSTF) of ultrashort pulses, has drawn more and more attention because of its various applications in microscopy, photoactivation for biological studies, and high precision three ...
Gang Li, Feng Lu, Hongjie Liu, Bo Cui, Wei Fan, Bin Zhu, Min Shui, Yuqiu Gu   +7 more
doaj   +1 more source

Customized Scattering‐Robust 3D Speckle Correlation for Improved Resolution and Imaging Depth in Scattering Tissue

Laser &Photonics Reviews, EarlyView.
A scattering‐robust 3D speckle customization method is proposed to enhance both resolution and imaging depth in scattering tissue. Applied to light‐field microscopy (LFM), it improves 3D resolution by over twofold under strong optical scattering. In wide‐field fluorescence imaging, it enables a substantial improvement in imaging depth, allowing imaging
Yue Xing, Yuqi Yang, Dongyu Du, Ying Li, Xin Jin   +4 more
wiley   +1 more source

Fast Simulation of Wide‐Angle Coherent Diffractive Imaging

Laser &Photonics Reviews, EarlyView.
The propagation multi‐slice Fourier transform method is introduced as an accurate and efficient approach for describing light scattering for arbitrarily shaped objects. Its exceptional suitability for simulating coherent diffractive imaging of nanoparticles in the XUV and soft X‐ray range is demonstrated.
Paul Tuemmler, Julia Apportin, Thomas Fennel, Christian Peltz   +3 more
wiley   +1 more source

Geometrization of the Huygens–Fresnel principle: Applications to Fraunhofer diffraction

AIP Advances
The classical wave theory can trace its historical origins to the seminal works of Christian Huygens, Thomas Young, and Augustin Fresnel. To explain some of light’s observed properties, such as rectilinear propagation, reflection, and refraction, Huygens
Joseph Ivin Thomas
doaj   +1 more source

Demonstration of Distributed Etched Diffraction Grating Demultiplexer

IEEE Photonics Journal, 2011
The design principles and measurement results for a compact shallow etched distributed diffraction grating waveguide demultiplexer are presented. The deeply etched diffraction grating facets are replaced with a shallow etched odd-order quarter wavelength
Amir Jafari, Andrew G. Kirk
doaj   +1 more source

Highly Durable and Uniform Structural Coloration via Spray‐Coated Organic Mie Resonators Randomly Distributed in Three Dimensions

Laser &Photonics Reviews, EarlyView.
This study demonstrates uniform, durable non‐iridescent structural coloration using polystyrene nanoparticles randomly embedded in a thick sodium silicate with absorptive additives. By suppressing the effects of the structure factor and multiple scattering, this approach achieves uniform coloration from the backscattering.
Jihun Kang, Seunghwan Moon, Dongyeon Jin, Jong‐Souk Yeo   +3 more
wiley   +1 more source

Uma visualização do princípio de Huygens-Fresnel na obtenção de um padrão de difração

Revista Brasileira de Ensino de Física
Utilizando a relação que fornece a irradiância devida à interferência de fontes pontuais, mostramos por meio de gráficos como o princípio de Huygens-Fresnel funciona quando é aplicado para determinar o padrão de difração de Fraunhofer gerado por uma onda
Valmar Carneiro Barbosa, Ana Maria Senra Breitschaft, José Paulo Rodrigues Furtado de Mendonça, Leonardo Marmo Moreira, Pedro Claudio Guaranho de Moraes   +4 more
doaj   +1 more source

Two‐Dimensional Transition Metal Dichalcogenides Properties Enhanced by Nano‐ and Micro‐Scale Shape Control

MetalMat, EarlyView.
This review explores current strategies for shaping two‐dimensional transition metal dichalcogenides (TMDs) beyond their planar form. It highlights how strain engineering, nanopatterning, and growth on complex substrates modulate their mechanical, optical, and electronic properties.
C. Grazianetti, G. Zambito, D. Campi, M. C. Giordano, F. Buatier de Mongeot, A. Molle, C. Martella   +6 more
wiley   +1 more source

Superimposed Sacrificial Texturing to Enhance the Optical Performance in Thin‐Film Solar Cells

Progress in Photovoltaics: Research and Applications, EarlyView.
Sacrificial texturing method using controlled etching of undoped zinc oxide and indium‐doped tin oxide generates microscale and nanoscale textures on glass. Roughness on two different scales is superimposed to create a new texture capable of broad‐spectrum scattering, which is utilised in thin‐film silicon solar cells to enhance optical performance ...
Govind Padmakumar, Matthias Criel, Tanya Kashyap, Federica Saitta, Paula Perez‐Rodriguez, René A. C. M. M. van Swaaij, Arno H. M. Smets   +6 more
wiley   +1 more source

Correlated X‐Ray and Electron Microscopies of a Single Biphasic GaAs Nanowire

Small Methods, EarlyView.
Nano‐focused scanning X‐ray diffraction microscopy at a synchrotron light source, combined with transmission electron microscopy, reveals a clear correlation between the nanoscale distribution of cubic and hexagonal segments in a GaAs nanowire with subtle variations in inter‐reticular spacing, bending, and twisting.
Thomas Dursap, Tao Zhou, Maxime Dupraz, Stéphane Labat, Olivier Thomas, Niels Fardeau, Philippe Regreny, Michel Gendry, Solène Brottet, Nicholas P. Blanchard, Martin V. Holt, Marie‐Ingrid Richard, Alexandru Danescu, José Penuelas, Matthieu Bugnet   +14 more
wiley   +1 more source