Results 81 to 90 of about 98,753 (267)

Topology Optimization Enables Freeform Matrix Fourier Optics

Advanced Optical Materials, EarlyView.
A topology‐optimized freeform metasurface is designed and fabricated to realize matrix Fourier optics, enabling the diffraction of multiple polarization states into distinct far‐field orders. By combining forward design with gradient‐based inverse optimization, high polarization contrast of up to 98.7% is achieved.
Yu‐Tzu Liu, Yun‐Chien Wu, Chang‐Yi Lin, Huan‐Teng Su, Yu‐Qi Zhou, Yao‐Wei Huang   +5 more
wiley   +1 more source

Differential Photoelectron Holography: A New Approach for Three-Dimensional Atomic Imaging

, 2003
We propose differential holography as a method to overcome the long-standing forward-scattering problem in photoelectron holography and related techniques for the three-dimensional imaging of atoms.
A. Szöke, B. P. Tonner, B. P. Tonner, C. M. Wei, C. S. Fadley, C. S. Fadley, D. Gabor, D. K. Saldin, D. K. Saldin, D.-A. Luh, E. Rotenberg, H. Wu, J. D. Denlinger, J. J. Barton, J. J. Barton, J. J. Barton, J. Wider, K. Reuter, L. J. Terminello, M. A. Van Hove, M. Tegze, P. Korecki, P. M. Len, P. M. Len, S. D. Kevan, S. G. Bompadre, S. Marchesini, S. Omori, S. Omori, S. Y. Tong, S. Y. Tong, T. Gog, T. Greber, Y. Chen, Y. Nihei   +34 more
core   +1 more source

Topological holography [PDF]

Physical Review D, 1999
We study a topological field theory in four dimensions on a manifold with boundary. A bulk-boundary interaction is introduced through a novel variational principle rather than explicitly. Through this scheme we find that the boundary values of the bulk fields act as external sources for the boundary theory.
Viqar Husain, Sebastian Jaimungal
openaire   +2 more sources

Effect of Core Geometry on Frequency Correlations and Channel Capacity of a Multimode Optical Fiber

Advanced Photonics Research, EarlyView.
Structured wavefronts focused at the output of multimode fibers reveal a distinct spatial dependence of frequency correlation bandwidth between circular and rectangular cores. Unlike conventional circular‐core fibers, rectangular‐core fibers maintain uniform bandwidth across all transverse locations, enabling over a 20% increase in channel capacity for
Henry C. Hammer, Ravitej Uppu
wiley   +1 more source

Tailoring Second Harmonic Generation via Strong Coupling in a One‐Dimensional Photonic Crystal Heterostructure

Advanced Photonics Research, EarlyView.
The strong coupling is investigated as an effective method to modulate the second‐harmonic generation (SHG) in the defect mode and Tamm plasmon resonances. Throughout the entire anticrossing Rabi splitting process induced by strong coupling, the difference in SHG efficiency between two resonances can be modulated by up to two orders of magnitude ...
Ying Zhu, Ruize Ma, Anlong Dong, Hangsheng Xu, Chunhua Wang, Meng Qin, Jianqiang Liu, Hongju Li   +7 more
wiley   +1 more source

Surface-Plasmon Holography

iScience, 2020
Summary: Holography was originally invented for the purpose of magnifying electron microscopic images without spherical aberration and has been applied to photography for recording and reconstructing three-dimensional objects.
Satoshi Kawata, Miyu Ozaki
doaj  

Low‐Loss Parowax‐Imprinted Diffractive Neural Network for Orbital Angular Momentum Terahertz Holographic Imaging

Advanced Photonics Research, EarlyView.
This work introduces a low‐loss diffractive neural network, fabricated using an imprinting technique with parowax material, for recognizing and manipulating the topological charge of orbital angular momentum (OAM) waves. It is also demonstrated that the low‐loss diffractive network can perform mathematical operations based on the topological charges of
Wei Jia, Miguel A. Gomez, Steve Blair, Michael A. Scarpulla, Berardi Sensale‐Rodriguez   +4 more
wiley   +1 more source

Resolution Enhancement of Geometric Phase Self-Interference Incoherent Digital Holography Using Synthetic Aperture

Photonics
Incoherent digital holography is a promising solution for acquiring three-dimensional information in the form of interference without a laser. Self-interference is the principal phenomenon of incoherent holography which splits the incident light wave ...
Youngrok Kim, KiHong Choi, Keehoon Hong, Sung-Wook Min   +3 more
doaj   +1 more source

Nanooptical elements for visual verification

Scientific Reports, 2021
This paper focuses on the development of flat diffractive optical elements (DOEs) for protecting banknotes, documents, plastic cards, and securities against counterfeiting.
Alexander Goncharsky, Anton Goncharsky, Dmitry Melnik, Svyatoslav Durlevich   +3 more
doaj   +1 more source

Extraction of Inherent Amplitude Mode from a Light Beam

Advanced Photonics Research, EarlyView.
Mode extraction is the inverse process of the double‐beam superposition principle in classical optics. While polarization mode extraction has been successfully demonstrated using an m‐order vector vortex beam, this article demonstrates the amplitude mode extraction of a light beam.
Zhiyang Xia, Xiaoyu Weng, Liwei Liu, Jun He, Changrui Liao, Yiping Wang, Junle Qu   +6 more
wiley   +1 more source