Results 91 to 100 of about 11,710 (245)

Microwave holograms and microwave reconstruction

Electronics Letters, 1969
Microwave holographic reconstruction of the metal objects inside a purse was achieved by a nonscanning method. A microwave field was used for both constructing and reconstructing the holographic image. The visualisation of the microwave field was performed by both Polaroid and liquid-crystal techniques. The frequency used was 34.26GHz.
openaire   +1 more source

Recent Advances in Photonic Bound States in the Continuum: From Fundamentals to Engineering and Implementation

Laser &Photonics Reviews, EarlyView.
This review summarizes recent progress in meta‐photonics with a focus on bound states in the continuum (BICs) as a powerful platform for light confinement and control. It covers fundamental concepts, design strategies across optical regimes, symmetry breaking for practical quasi‐BICs, tunable and AI‐assisted BIC devices, and emerging applications in ...
Hafiz Saad Khaliq, Hak‐Rin Kim
wiley   +1 more source

XUV digital in-line holography using high-order harmonics

, 2007
A step towards a successful implementation of timeresolved digital in-line holography with extreme ultraviolet radiation is presented. Ultrashort XUV pulses are produced as high-order harmonics of a femtosecond laser and a Schwarzschild objective is used
A. L’Huillier, A.-S. Morlens, C. Jacobsen, C.-G. Wahlström, D. Gabor, E. Georgiadou, E. Mengotti, E. Pourtal, F. Brizuela, G. Genoud, H.N. Chapman, I. McNulty, I.J. Kim, J. Garcia-Sucerquia, J. Mauritsson, J.P. Allebach, L. Déroff Le, O. Guilbaud, P. Zeitoun, R. Bartels, R.A. Bartels, R.I. Tobey, R.L. Sandberg, S. Eisebitt, S.-G. Pettersson, T. Pfeifer, U. Schnars, V. Ayvazyan, X. Deng, X.H. Huang   +29 more
core   +1 more source

Wavelength and Full‐Polarization Encrypted Orbital Angular Momentum Meta‐Holography

Laser &Photonics Reviews, EarlyView.
By multiplexing three independent degrees of freedom of light, a single‐layer geometric‐phase metasurface encrypts 24 distinct holographic images across 3 wavelengths, 12 pairs of orthogonal polarizations, and 4 OAM channels, taking advantage of axial chromatic dispersion to reconstruct the color images at the same plane. ABSTRACT Multiplexing multiple
Yue Han, Mingna Xun, Yuqing He, Sheng Ye, Weiping Wan, Yan Li   +5 more
wiley   +1 more source

The Application of Telemedicine in Surgery

Med Research, EarlyView.
This figure provides an overview of the content presented in this article. Telemedicine is integrated throughout the entire surgical workflow, with distinct applications across the preoperative, intraoperative, and postoperative phases. These applications are enabled by a suite of supporting technologies, while the associated implementation challenges ...
Yufan Yang, Chang Liu, Xue Sun, Yiting Wang, Minghui Zhao, Shuya Jiang, Haoling Zhang, Wangzheqi Zhang, Wenwen Shi   +8 more
wiley   +1 more source

Sparsity-Guided Phase Retrieval to Handle Concave- and Convex-Shaped Specimens in Inline Holography, Taking the Complexity Parameter into Account

Optics
In this work, we explore an optimization idea for the complexity guidance of a phase retrieval solution for a single acquired hologram. This method associates free-space backpropagation with the fast iterative shrinkage-thresholding algorithm (FISTA ...
Yao Koffi, Jocelyne M. Bosson, Marius Ipo Gnetto, Jeremie T. Zoueu   +3 more
doaj   +1 more source

Multispectral in-line hologram reconstruction with aberration compensation applied to Gram-stained bacteria microscopy. [PDF]

Sci Rep, 2023
Brault D, Olivier T, Faure N, Dixneuf S, Kolytcheff C, Charmette E, Soulez F, Fournier C.   +7 more
europepmc   +1 more source

Emergent Chaos‐Like Dynamics of Spin–Orbit‐Torque‐Driven Magnetic Transitions

Small, EarlyView.
By combining anisotropy‐engineered nanometer‐scale nucleation sites with time‐resolved x‐ray holography and micromagnetic modeling, magnetization dynamics are directly imaged, revealing chaos‐like fluctuations and skyrmion shedding and highlighting the intrinsic complexity of spin‐orbit torque driven systems.
L.‐M. Kern, K. Litzius, V. Deinhart, M. Schneider, C. Klose, K. Gerlinger, R. Battistelli, D. Metternich, D. Engel, C. M. Günther, M.‐J. Huang, K. Höflich, F. Büttner, S. Eisebitt, B. Pfau   +14 more
wiley   +1 more source

Effects of Irregular Bathymetry on Hologram Formation of Moving Source in Shallow Water

Journal of Marine Science and Engineering
This paper examines the effect of irregular bathymetry on the holographic reconstruction of the sound field generated by a moving source in shallow water. In this scenario, acoustic waves propagate along the path between the source and receiver.
Sergey Pereselkov, Venedikt Kuz’kin, Matthias Ehrhardt, Sergey Tkachenko, Alexey Pereselkov, Nikolay Ladykin   +5 more
doaj   +1 more source

Fourier Imager Network (FIN): A deep neural network for hologram reconstruction with superior external generalization. [PDF]

Light Sci Appl, 2022
Chen H, Huang L, Liu T, Ozcan A.
europepmc   +1 more source