Results 41 to 50 of about 9,428,387 (285)

The Talbot effect of plasmonic nanolenses

Optics Express, 2011
The Talbot effect of an Ag nanolens with five periodic concentric rings that are illuminated by the radially polarized light was numerically studied by means of rigorous finite-difference and time-domain (FDTD) algorithm. It was found that the Talbot effect occurs only when the incident wavelength is at the scale of less than half of period of the ...
Lingli, Li, Yongqi, Fu, Hongsheng, Wu, Ligong, Zheng, Hongxin, Zhang, Zhenwu, Lu, Qiang, Sun, Weixing, Yu   +7 more
openaire   +2 more sources

Temporal Lau effect: Noncoherent Regeneration of Periodic Pulse Trains [PDF]

Journal of the European Optical Society-Rapid Publications, 2006
We present an optical method for implementing the temporal Talbot effect with a spectrally incoherent optical source and a linear dispersive medium, at the first-order dispersion regime.
Lancis Jesús, Gómez-Sarabia Cristina M., Ojeda-Castañeda Jorge, Fernández-Pousa Carlos R., Andrés Pedro   +4 more
doaj   +1 more source

Talbot effect with rough reflection gratings [PDF]

Applied Optics, 2007
The Talbot effect is analyzed when steel tape gratings are used. These gratings are made on a steel substrate, and, because of the manufacture process, both levels of the grating are rough with different roughness parameters. A theoretical analysis based on Fresnel regime, which considers the statistical properties of roughness, is developed ...
Torcal Milla, Francisco José, Sánchez Brea, Luis Miguel, Bernabeu Martínez, Eusebio   +2 more
openaire   +3 more sources

Nonlinear Talbot effect in electromagnetically induced optical lattice

Results in Physics
The nonlinear Talbot effect means formation of self-imaging of the periodic structure by utilizing the harmonic wave instead of the fundamental one.
Ruibo Ru, Huangjie Li, Sannv Zhang, Hao Pang, Churong Pan, Haixia Chen, Dong Wei, Hong Gao, Fuli Li   +8 more
doaj   +1 more source

Evolution of Amplitude Fluctuation in Fractional Temporal Talbot Effect

IEEE Access, 2019
Temporal Talbot phenomena occur when a periodic optical pulse train propagates through a dispersive medium with a proper dispersion amount, which includes integer and fractional orders depending on the dispersion amount.
Hao Chi, Junna Xing, Shuna Yang, Tao Jin
doaj   +1 more source

Hybrid Talbot effect

Optics Express
The Talbot effect resulting from a hybrid superposition of Hermite-Gaussian beams and Laguerre-Gaussian beams is studied theoretically. The traditional Talbot effect associated with periodic gratings can be explained by the superposition of a series of plane waves.
Jialing, Li, Yizheng, Yao, Chenglong, Wang, Xuhui, Sun, Miao, Zhu, Siqin, Yan, Zhenyu, Zhao, Jiaxin, Fu, Xiao, Lei, Chao, Zhang, Yiqiang, Qin   +10 more
openaire   +2 more sources

Talbot-Lau devices: a reappraisal

Frontiers in Sensors
The Talbot effect and the Lau effect have been usefully applied in optical interferometry, and for designing novel X-ray devices, as well as for implementing useful instruments for matter waves.
Cristina M. Gómez-Sarabia, Jorge Ojeda-Castañeda   +1 more
doaj   +1 more source

Non‐destructive inspection for FRPM pipeline using periodic pattern of microwave guided‐modes on cylindrical dielectric waveguide

Electronics Letters, 2021
The authors propose a new non‐destructive inspection method for underground fiberglass‐reinforced plastic mortar pipelines utilizing the periodic patterns of microwave guided‐modes on a hollow cylindrical dielectric waveguide. By the spatial synthesis of
Sayaka Matsukawa, Kosuke Yoshida, Tadahiro Okuda, Masaya Hazama, Satoru Kurokawa, Hiroshi Murata   +5 more
doaj   +1 more source

Effect of Particle Size Distribution on the Dynamic Mechanical Properties and Fractal Characteristics of Cemented Rock Strata

Mathematics, 2022
To investigate the dynamic mechanics and post-failure characteristics of fault-cemented rock strata, broken rock particles were reshaped to obtain cemented rock samples with various particle size distributions (PSDs).
Jiajun Wang, Linqi Huang, Xibing Li, Yangchun Wu, Huilin Liu   +4 more
doaj   +1 more source

Sub‐Diffraction and Irreversibly Tunable Imaging With Potato Starch Lenses

Advanced Optical Materials, EarlyView.
Native potato starch granules function as sustainable birefringent microlenses that enable polarization‐controlled conventional and vortex lensing via spin‐to‐orbital angular momentum conversion. They provide sub‐diffraction and spiral‐contrast imaging, support vortex‐array generation with controllable topological‐charge sign, exhibit irreversible ...
Petr Bouchal, Jiří Liška, Petr Viewegh, Radim Chmelík, Tomáš Šikola, Zdeněk Bouchal   +5 more
wiley   +1 more source