Results 101 to 110 of about 217,553 (313)

Birefringence and hidden photons [PDF]

open access: yes, 2018
We study a model where photons interact with hidden photons and millicharged particles through a kinetic mixing term. Particularly, we focus on vacuum birefringence effects and we find a bound for the millicharged parameter assuming that hidden photons ...
Ariel Arza, J. Gamboa
core   +1 more source

Uniform Amorphization of Crystalline Silicon Surfaces Enabled by Deep Ultraviolet Femtosecond Laser Pulses

open access: yesAdvanced Engineering Materials, EarlyView.
Deep‐UV (258 nm) femtosecond pulses enable uniform amorphous silicon writing on Si(100)/(111) with a six‐fold larger fluence amorphization window than NIR methods. Optimized fluence and overlap yield 20–45 nm uniform and continuous amorphous layers. Microscopy shows sharp interfaces, and real‐time reflectivity reveals nanosecond melt–resolidification ...
Wissal Benali   +5 more
wiley   +1 more source

Superluminal noncommutative photons [PDF]

open access: yes, 2001
With the help of the Seiberg–Witten map, one can obtain an effective action of a deformed QED from a noncommutative QED. Starting from the deformed QED, we investigate the propagation of photons in the background of electromagnetic field, up to the ...
Cai, Rong-Gen, Rong-Gen Cai
core   +1 more source

Method of canonical transformations in the theory of quantum gases interacting with radiation

open access: yesCondensed Matter Physics
 An approach to the theoretical study of effects and phenomena in quantum gases interacting with radiation is proposed. The approach is based on a modification of the canonical transformation method, which was once used to diagonalize Hamiltonians ...
M. S. Bulakhov   +4 more
doaj   +1 more source

DNA‐Templated 2D Heterostructures as Phototriggered Dynamic Nanohybrids: From Releasing Molecular Loads to Controlling Enzyme Biocatalytic Function

open access: yesAdvanced Functional Materials, EarlyView.
DNA strands are employed both as dynamic linkers and nanoscale templates for the integration of Ag2S nanoparticles on MoS2, which in turn imparted photothermal responsiveness; this feature permits the selective cargo (fluorophore, quantum dots or an enzyme) release from the MoS2 surface in response to local heat induced by light irradiation.
Kai Chen   +3 more
wiley   +1 more source

Measurement Of [PDF]

open access: yes, 2007
Introduction A new state of matter, called Quark Gluon Plasma(QGP) may be formed in ultra-relativistic heavy ion collision if sufficient high energy density is reached.
Zubayer Ahammed, For Photons
core  

Heralded generation of entanglement with photons [PDF]

open access: yes
Entangled states of photons form the backbone of many quantum technologies. Due to the lack of effective photon–photon interactions, the generation of these states is typically probabilistic.
Singh, Sukhjit P   +9 more
core   +1 more source

Thermodynamics of the substantial universe

open access: yesЛитьë и металлургия
Based on thermodynamic calculations of the substantial Universe, it is shown that the cosmological theory of the Big Bang is erroneous. The thermodynamic ban on this theory makes the hypothesis of dark energy expanding the substantial Universe also ...
V. Yu. Stetsenko
doaj   +1 more source

Strain‐Programmable Luminescent Adhesive Patch With Tartrazine‐Mediated Optical Skin Clearing for Photochemical Tissue Bonding

open access: yesAdvanced Functional Materials, EarlyView.
We propose a suture‐complementary approach that integrates optical skin clearing with a strain‐programmable luminescent adhesive patch. Hyaluronic acid promotes transdermal delivery of tartrazine to improve optical clearing and stabilizes its interaction with a photosensitizer. Optical clearing increases the penetration depth of visible light into skin,
Seong‐Jong Kim   +6 more
wiley   +1 more source

Photoproduction of Neutral Pions from Complex Nuclei: An Indirect Measurement of the π° Lifetime [PDF]

open access: yes, 1962
The cross section for the photoproduction of neutral pions from complex nuclei at small angles has been measured in an attempt to determine the π° lifetime from the reaction γ + γ → π° where one of the photons is provided by the Coulomb field of the ...
Ruderman, Henry
core  

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