Results 101 to 110 of about 2,070,111 (343)
Focusing with planar microlenses made of two-dimensionally varying high contrast gratings [PDF]
, 2014 The authors thank the European Union for the financial support through Marie Curie Action FP7-PEOPLE-2010-ITN Project No. 264687 “PROPHET”.We report on the focusing performance of reflective two-dimensionally varying high contrast grating lenses based on
Krauss, T.F. +5 more
core +1 more source
Unlocking Terahertz Steganography: Authentication of Hidden Images in Flexible Media
Advanced Materials Technologies, EarlyView.Hidden information in multilayered devices, such as steganographic portraits, is detected and authenticated using reflection‐mode terahertz time‐domain imaging. Image reconstruction relies on a dedicated figure‐of‐merit obtained by integrating the signal intensity over the time‐window associated with the reflection from the metallic mirror backing the ...
Tiziana Ritacco +4 more
wiley +1 more source
Changes of the diffraction efficiency due to emulsions thicknesses in holographic gratings [PDF]
, 2007 We analyze the behavior of the diffraction efficiency as a function of the thickness of the relief holographic grating recorded on a phase emulsion composed by rosin and bromophenol blue (BPB) dye.
ARTURO OLIVARES PEREZ +1 more
core
Advanced Optical Materials, EarlyView.Low‐index and low‐loss vdW muscovite represents an emerging robust dielectric platform for the creation of next‐generation all‐vdW nanophotonic architectures. Its utilization as a low‐index building‐block in all‐vdW multilayers enables extreme optical contrast when paired with MoS2, paving the way to the realization of few‐layer ultrathin DBS ...
Meri H. Hayrapetyan +10 more
wiley +1 more source
A simple method for fabricating phase-shifted fibre Bragg gratings with flexible choice of centre wavelength [PDF]
, 2009 A simple technique for fabricating phase-shifted fibre Bragg gratings (PSFBGs) without the use of a phase-shifted phase mask is presented. Two, 3-mm long, standard fibre Bragg gratings (FBGs) were inscribed sequentially in singlemode fibre at the same
Ralph P. Tatam +5 more
core +1 more source
Large‐Area Flat Optics Color Routing in Tilted Arrays of 2D Semiconductor Nanostripes
Advanced Optical Materials, EarlyView.We develop a scalable flat optics platform exploiting self‐organised ion‐beam sputtering and maskless glancing‐angle deposition to fabricate centimetre‐scale arrays of tilted MoS2 nanostripes. The engineered geometry activates Rayleigh anomalies, guided modes, and Mie resonances, enabling highly directional color routing and enhanced light harvesting ...
Simone Di Marco +7 more
wiley +1 more source
Diffraction Theory of Spatiotemporally Periodic Gratings
, 2019 We present the theory of the diffraction of electromagnetic waves by generalized spacetime periodic diffraction gratings. It is shown that such gratings produce spatial and temporal diffraction orders, yielding a quite unique diffraction pattern, not ...
Taravati, Sajjad +3 more
core +1 more source
Advanced Optical Materials, EarlyView.A maskless, SLM‐driven approach enables the deterministic inscription of arbitrary topographical features in azopolymer films by mapping complex vectorial light fields onto local viscoplastic stress. This platform allows for the rapid generation and dynamic erasure of high‐aspect‐ratio micro‐spikes, offering a versatile tool for reconfigurable flat ...
Jonas Strobelt +3 more
wiley +1 more source
AIP Advances, 2014 The possibility of surface wave generation by diffraction of pressure waves on deeply corrugated one-dimensional phononic crystal gratings is studied both theoretically and experimentally.
Rayisa P. Moiseyenko +4 more
doaj +1 more source