Communications in Physics
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Extensive Air Showers and the LPM Effect
Communications in Physics - Tập 20 Số 2 - 2010
A very simple model of thelongitudinal development of electromagnetic showers is presented,allowing for easy calculations at the highest energies where usualsimulation codes become impracticable because of the enormousmultiplicity of secondary shower particles. Shower profiles aredescribed in terms of a few parameters having Gaussianfluctuations. The model is applied to the impact of theLandau-Pom......
Secure Information Exchange Without Prior Key Distribution via Single-photon Hyperstates
Communications in Physics - Tập 32 Số 3 - 2022
Methods for two distant parties to exchange their secret messages using single photons are considered. There existed several such methods but they are either insecure or face with information leakage problem. Recently, Ye et al. [Quantum Inf. Process. 20 (2021) 209] have reported a method using single photons in both polarization and spatial degrees of freedom that is both efficient and resistant ......
#Secure information exchange #information leakage #single-photon hyperstates
Enhanced Performance in Polymer Light Emmiting Diode by Using Ultra-thin Conductive Films as the Buffer Layer
Communications in Physics - Tập 24 Số 3S1 - 2014
The ultra-thin nanocomposite films based on the nano-crystal TiO$_{2}$ (TiO$_{2}$-nc) or multi-walled carbon nano-tube (MWCNTs) were prepared and used as the buffer layers in the fabrication of the organic light-emitting diodes (OLEDs). The injection efficiency of the hole and electron was improved by inserting an ultra-thin buffer layer between the electrodes and emissive layer. The turn-on ......
#nanocomposites #conducting polymer #blended polymer #light emitting diode #CNTs.
Two Spot Coupled Ring Resonators
Communications in Physics - Tập 29 Số 4 - 2019
Abstract. We consider a model of two coupled ring waveguides with constant linear gain and nonlinear absorption with space-dependent coupling. This system can be implemented in various physical situations as optical waveguides, atomic Bose-Einstein condensates, polarization condensates, etc. It is described by two coupled nonlinear Schrödinger equation. For numerical simulations, we take local two......
#Bose Einstein condensates #nonlinear optical systems #ring resonators
Raman Laser with a Singly Resonant Cavity: Theoretical Model and Experiment
Communications in Physics - Tập 28 Số 4 - 2018
A semiclassical theoretical model of a Raman laser possessing a cavity which is resonant at the Stokes wavelength and not resonant at the pump wavelength has been developed. The wave equations describing evolution of amplitudes of the pump and Stokes pulses in the Raman cavity have been derived. Results of the theoretical modeling have been analyzed for conditions of an experiment with the Raman l......
#stimulated Raman scattering #solid-state laser #external cavity Raman laser
Mass of the Lightest Neutral CP-even Higgs in the Supersymmetric Minimal Reduced 3-3-1 Mode
Communications in Physics - Tập 24 Số 3 - 2014
We calculate the mass of the lightest neutral CP-even Higgs in the frame work of the supersymmetric reduced minimal 3-3-1 model (SUSYRM331) at one-loop level. Like MSSM, at tree level this value of mass is smaller than that of \(m_Z=92\) GeV, inconsistent with value of 125 GeV measured by recent experiment. In this work we prove that the mass of the lightest neutral CP-even Higgs will get the cons......
#standard model and byond
Challenges in particle physics and 3-3-1 models
Communications in Physics - Tập 25 Số 2 - 2015
At present, particle physics faces problems related with disparity in diphoton decay of Higgs boson, discrepancybetween theory and experiment of about $3.6 \si$ in anomalous magnetic moment of the muon and neutrino physics.Moreover, the existence of Dark Matter and the Matter-Antimatter Asymmetry are challenges for any physical model.In this review I present some solutions in the framework ......
#Particle-theory and field-theory models %of the early Universe #Supersymmetric models #Non-standard-model %neutrinos #right-handed neutrinos
Effect of Geometrical Properties on Localized Surface Plasmon Resonance of Gold Nanoparticles
Communications in Physics - Tập 31 Số 4 - 2021
This work reportson plasmonic effects (i.e light scattering and absorption properties) induced by two different gold nanoparticles (AuNPs)-shaped: spherical particle and triangular particle. The scattering cross-section and electric field profiles have been investigated by using theboundary element method (MNPBEM toolbox). Two configurations: the isolated AuNPand the coupledtwo-gold NPsystem have ......
#simulation #plasmonic #metallic nanoparticle #nanosphere #nanotriangle
Theranostic Gold Nanoshells: from Synthesis to Imaging and Photothermal Therapy Applications
Communications in Physics - Tập 24 Số 3S2 - 2016
Gold nanoshells (GNSs) were grown on monodispersed aminoprotpyltriethoxysilane (APTES) functionalized of silica nanoparticles (NPs) cores with varying sizes ranging from 40-180 nm synthesized by Stober route. Gold shells were deposited onto the surface of silica NPs by tetrakis(hydroxymethyl) phosphonium chloride (THPC) and electroless gold plating method. The coverage of the gold nanoshells on th......
#gold nanoshells #silica NPs #SPR #dark field image #photothermal therapy
Synthesis and Photoluminescent Property of \(\text{MgO:Cr}^{3+}\) Powders
Communications in Physics - Tập 22 Số 3 - Trang 239 - 2012
MgO:Cr3+ powders with different dopant contents have been synthesized by sol-gel method using the following precursors: magnesium nitrate (Mg(NO3)2), chrome nitrate (Cr(NO\(_3\))\(_3\)), and citric acid. The effect of the Cr\(^{3+}\) concentration and heat-treating temperature on structural and optical properties of the synthesized samples has been studied. For the samples with the low Cr3+-dopant......
#MgO #Cr$^{3 }$ #Synthesis #Photoluminescence
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