Results 81 to 90 of about 82,025 (227)
Synthesis of nano-optical elements for zero-order diffraction 3D imaging
Scientific Reports, 2022 A method is proposed to compute and synthesize a microrelief to produce a new nano-optical element for forming 3D images with full parallax at the zero order of diffraction. The synthesis of nano-optical elements requires the use of multilevel structures.
Alexander Goncharsky +3 more
doaj +1 more source
Holographic Cosmology and its Relevant Degrees of Freedom [PDF]
, 1999 We reconsider the options for cosmological holography. We suggest that a global and time--symmetric version of the Fischler-Susskind bound is the most natural generalization of the holographic bound encountered in AdS and De Sitter space.
Dawid, Richard
core +6 more sources
Multifunctional Metasurfaces for Bridging Terahertz Waves in Free Space and Waveguides
Advanced Physics Research, EarlyView.A multifunctional terahertz metasurface capable of simultaneous orthogonal polarization conversion and phase modulation is integrated onto a dielectric slab waveguide, thereby enabling efficient free‐space‐to‐guided‐wave coupling. By implementing tailored phase gradients on the metasurface, we demonstrate the formation of a focused spot within the ...
Jinhui Lu +5 more
wiley +1 more source
Digital Holography at Shot Noise Level [PDF]
, 2010 By a proper arrangement of a digital holography setup, that combines off-axis geometry with phase-shifting recording conditions, it is possible to reach the theoretical shot noise limit, in real-time experiments.We studied this limit, and we show that it
Atlan, Michael +3 more
core +7 more sources
Ambident Reactivity in the Phenyl + NO Radical Recombination
Chemistry – A European Journal, EarlyView.ABSTRACT The recombination reaction of nitric oxide (NO) with radicals via its oxygen atom, rather than the more common nitrogen site, offers an intriguing pathway to the formation of oxynitrenes. The photochemical isomerization of nitroso compounds into their corresponding oxynitrenes may involve such a step.
Virinder Bhagat +3 more
wiley +1 more source
Physical Review D, 2006 19 pages, 1 figure; v2: references and minor corrections added. now 20 pages; v3: derivation of Jacobi polynomials clarified as well as simplified.
Erlich, Joshua +2 more
openaire +2 more sources
International Journal of Modern Physics D, 2003 An elementary introduction to Maldacena's AdS/CFT correspondence is given, with some emphasis in the Fefferman–Graham construction. This is based on lectures given by one of us (E.A.) at the Universidad Autonoma de Madrid.
Álvarez, Enrique +2 more
openaire +3 more sources
Aspects of Ultra-Relativistic Field Theories via Flat-space Holography
, 2017 Recently it was proposed that asymptotically flat spacetimes have a holographic dual which is an ultra-relativistic conformal field theory. In this paper, we obtain the conformal anomaly for such a theory via the flat-space holography technique ...
Fareghbal, Reza +2 more
core +2 more sources
EcoEnergy, EarlyView.Despite its potential, photocatalysis is limited by inefficient charge carrier separation and transport. This article reviews the mechanisms, characterization methods, and strategies for improvement, concluding with future challenges in the field. ABSTRACT Photocatalysis offers a promising solution to environmental and renewable energy issues. However,
Leqi Cheng +5 more
wiley +1 more source
Ferroelectric Electron Holography [PDF]
Microscopy and Microanalysis, 2002 Ferroelectrics are increasingly important as materials in semiconductor technology, e.g. for building non-volatile memory chips. For optimisation of the properties of such devices, there is an urgent need for methods, which analyse the ferroelectric properties at nanometer scale. Furthermore, the basic understanding of the interaction of ferroelectrics
Hannes, Lichte +3 more
openaire +2 more sources