Theoretical calculation and experiment of microwave electromagnetic property of Ni(C) nanocapsules
(2+1)-dimensional dissipation nonlinear Schrödinger equation for envelope Rossby solitary waves and chirp effect
Two-dimensional fracture analysis of piezoelectric material based on the scaled boundary node method
A scaled boundary node method (SBNM) is developed for two-dimensional fracture analysis of piezoelectric material, which allows the stress and electric displacement intensity factors to be calculated directly and accurately. As a boundary-type meshless method, the SBNM employs the moving Kriging (MK) interpolation technique to an approximate unknown field in the circumferential direction and therefore only a set of scattered nodes are required to discretize the boundary. As the shape functions satisfy Kronecker delta property, no special techniques are required to impose the essential boundary conditions. In the radial direction, the SBNM seeks analytical solutions by making use of analytical techniques available to solve ordinary differential equations. Numerical examples are investigated and satisfactory solutions are obtained, which validates the accuracy and simplicity of the proposed approach.
New analytical exact solutions of time fractional KdV–KZK equation by Kudryashov methods
Nonrelativistic Shannon information entropy for Kratzer potential
Kraus operator solutions to a fermionic master equation describing a thermal bath and their matrix representation
Deformed photon-added entangled squeezed vacuum and one-photon states: Entanglement, polarization, and nonclassical properties
Fidelity between Gaussian mixed states with quantum state quadrature variances
Weakly interacting spinor Bose-Einstein condensates with three-dimensional spin-orbit coupling
Starting from the Hamiltonian of the second quantization form, the weakly interacting Bose-Einstein condensate with spin-orbit coupling of Weyl type is investigated. It is found that the SU(2) nonsymmetric term, i.e., the spin-dependent interaction, can lift the degeneracy of the ground states with respect to the z component of the total angular momentum Jz, casting the ground condensate state into a configuration of zero Jz. This ground state density profile can also be affirmed by minimizing the full Gross-Pitaevskii energy functional. The spin texture of the zero Jz state indicates that it is a knot structure, whose fundamental group is π3(M)π3(S2)=Z.
Dynamics of spinor Bose-Einstein condensate subject to dissipation
Phase sensitivity of two nonlinear interferometers with inputting entangled coherent states
Compressed sensing sparse reconstruction for coherent field imaging
Preparation and room temperature NO2-sensing performances of porous silicon/V2O5 nanorods
Ab initio study on the electronic states and laser cooling of AlCl and AlBr
We investigate whether AlCl and AlBr are promising candidates for laser cooling. We report new ab initio calculations on the ground state X1Σ+ and two low-lying states (A1Π and a3Π) of AlCl and AlBr. The calculated spectroscopic constants show good agreement with available theoretical and experimental results. We also obtain the permanent dipole moments (PDMs) curve at multi-reference configuration interaction (MRCI) level of theory. The transition properties of A1Π and a3Π states are predicted, including the transition dipole moments (TDMs), Franck-Condon factors (FCFs), radiative times and radiative width. The calculated radiative lifetimes are of the order of a nanosecond, implying that they are sufficiently short for rapid laser cooling. Both AlCl and AlBr have highly diagonally distributed FCFs which are crucial requirement for molecular laser cooling. The results demonstrate the feasibility of laser cooling AlCl and AlBr, and we propose laser cooling schemes for AlCl and AlBr.
Comment on “Atomic structure calculations for F-like tungsten” by S. Aggarwal [Chin. Phys B 23 (2014) 093203]
High-order harmonic generation of the N2 molecule in two-color circularly polarized laser fields Hot!
The generation of high-order harmonics and the attosecond pulse of the N2 molecule in two-color circularly polarized laser fields are investigated by the strong-field Lewenstein model. We show that the plateau of spectra is dramatically extended and a continuous harmonic spectrum with the bandwidth of 113 eV is obtained. When a static field is added to the x direction, the quantum path control is realized and a supercontinuum spectrum can be obtained, which is beneficial to obtain a shorter attosecond pulse. The underlying physical mechanism is well explained by the time-frequency analysis and the semi-classical three-step model with a finite initial transverse velocity. By superposing several orders of harmonics in the combination of two-color circularly polarized laser fields and a static field, an isolated attosecond pulse with a duration of 30 as can be generated.
Differential cross sections for electron impact excitation of molecular hydrogen using the momentum-space multichannel optical method
Soliton excitation in the pass band of the transmission line based on modulation
We numerically investigate the excitation of soliton waves in the nonlinear electrical transmission line formed by many cells. When the periodic driving voltage with frequency in the pass band closing to the cutoff frequency is applied to the endpoint of the whole line, the soliton wave can be generated. The numerical results show that the soliton wave generation mainly depends on the self modulation associated with the nonlinear effect. In this study, the lower subharmonic component is also observed in the frequency spectrum. To further understand this phenomenon, we study the dependence of the subharmonic power spectrum and frequency on the forcing amplitude and frequency numerically, and find that the subharmonic frequency increases with the gradual growth of the driving amplitude.
Propagation of Airy Gaussian vortex beams in uniaxial crystals
The effect of a permanent dipole moment on the polar molecule cavity quantum electrodynamics
Dynamics of a three-level V-type atom driven by a cavity photon and microwave field
Laser frequency locking based on the normal and abnormal saturated absorption spectroscopy of 87Rb
We present a practical method to avoid the mis-locking phenomenon in the saturated-absorption-spectrum laser-frequency-locking system and set up a simple theoretical model to explain the abnormal saturated absorption spectrum. The method uses the normal and abnormal saturated absorption spectra of the same transition 52S1/2, F=2-52P3/2, F'=3 saturated absorption of the 87Rb D2 resonance line. After subtracting these two signals with the help of electronics, we can obtain a spectrum with a single peak to lock the laser. In our experiment, we use the normal and inverse signals of the transitions 52S1/2, F=2-52P3/2, F'=3 saturated absorption of the 87Rb D2 resonance line to lock a 780-nm distributed feedback (DFB) diode laser. This method improves the long-term locking performance and is suitable for other kinds of diode lasers.
Monolithic CEO-stabilization scheme-based frequency comb from an octave-spanning laser Hot!
We demonstrate a carrier-envelope phase-stabilized octave-spanning oscillator based on the monolithic scheme. A wide output spectrum extending from 480 nm to 1050 nm was generated directly from an all-chirped mirror Ti:sapphire laser. After several improvements, the carrier-envelope offset (CEO) beat frequency accessed nearly 60 dB under a resolution of 100 kHz. Using a feedback system with 50-kHz bandwidth, we compressed the residual phase noise to 55 mrad (integrated from 1 Hz to 1 MHz) for the stabilized CEO, corresponding to 23-as timing jitter at the central wavelength of 790 nm. This is, to the best of our knowledge, the smallest timing jitter achieved among the existing octave-spanning laser based frequency combs.
A closed form of a kurtosis parameter of a hypergeometric-Gaussian type-II beam
Spectral distortion of dual-comb spectrometry due to repetition rate fluctuation
Frequency-stabilized Yb:fiber comb with a tapered single-mode fiber
We demonstrate a stable Yb:fiber frequency comb with supercontinuum generation by using a specially designed tapered single-mode fiber, in which a spectrum spanning from 500 nm to 1500 nm is produced. The carrier-envelope offset signal of the Yb:fiber comb is measured with a signal-to-noise ratio of more than 40 dB and a linewidth narrower than 120 kHz. The repetition rate and carrier-envelope offset signals are simultaneously phase locked to a microwave reference frequency.
Modulation of terahertz generation in dual-color filaments by an external electric field and preformed plasma
Strip silicon waveguide for code synchronization in all-optical analog-to-digital conversion based on a lumped time-delay compensation scheme
Planar waveguides in neodymium-doped calcium niobium gallium garnet crystals produced by proton implantation
Study of the temperature rise induced by a focusing transducer with a wide aperture angle on biological tissue containing ribs
We used the spheroidal beam equation to calculate the sound field created by focusing a transducer with a wide aperture angle to obtain the heat deposition, and then we used the Pennes bioheat equation to calculate the temperature field in biological tissue with ribs and to ascertain the effects of rib parameters on the temperature field. The results show that the location and the gap width between the ribs have a great influence on the axial and radial temperature rise of multilayer biological tissue. With a decreasing gap width, the location of the maximum temperature rise moves forward; as the ribs are closer to the transducer surface, the sound energy that passes through the gap between the ribs at the focus decreases, the maximum temperature rise decreases, and the location of the maximum temperature rise moves forward with the ribs.
Analytical solution based on the wavenumber integration method for the acoustic field in a Pekeris waveguide
Initiation of vacuum breakdown and failure mechanism of the carbon nanotube during thermal field emission
Numerical analysis of the optimized performance of the electron cyclotron wave system in a HL-2M tokamak
Surface diffuse discharge mechanism of well-aligned atmospheric pressure microplasma arrays
Electrical and optical characteristics of the radio frequency surface dielectric barrier discharge plasma actuation
Characteristics of droplets ejected from liquid glycerol doped with carbon in laser ablation propulsion
Microstructure and lateral conductivity control of hydrogenated nanocrystalline silicon oxide and its application in a-Si:H/a-SiGe:H tandem solar cells
Pressure-induced solidifications of liquid sulfur below and above λ-transition
Convenient synthesis of stable silver quantum dots with enhanced photoluminescence emission by laser fragmentation
Radiation-induced 1/f noise degradation of PNP bipolar junction transistors at different dose rates
Large scale silver nanowires network fabricated by MeV hydrogen (H+) ion beam irradiation
Channeling of fast ions through the bent carbon nanotubes: The extended two-fluid hydrodynamic model
Complete low-frequency bandgap in a two-dimensional phononic crystal with spindle-shaped inclusions
Structure phase transformation and equation of state of cerium metal under pressures up to 51 GPa
Optoelectronic properties of SnO2 thin films sprayed at different deposition times
Investigations of mechanical, electronic, and magnetic properties of non-magnetic MgTe and ferro-magnetic Mg0.75TM0.25Te (TM=Fe, Co, Ni): An ab-initio calculation
Fabrications and characterizations of high performance 1.2 kV, 3.3 kV, and 5.0 kV class 4H-SiC power SBDs
Inverted polymer solar cells with employing of electrochemical-anodizing synthesized TiO2 nanotubes
Design of terahertz beam splitter based on surface plasmon resonance transition
Excitonic transitions in Be-doped GaAs/AlAs multiple quantum well
Dirac operator on the sphere with attached wires
An explicitly solvable model for tunnelling of relativistic spinless particles through a sphere is suggested. The model operator is constructed by an operator extensions theory method from the orthogonal sum of the Dirac operators on a semi-axis and on the sphere. The transmission coefficient is obtained. The dependence of the transmission coefficient on the particle energy has a resonant character. One observes pairs of the Breit-Wigner and the Fano resonances. It correlates with the corresponding results for a non-relativistic particle.
Study on electrical defects level in single layer two-dimensional Ta2O5
Two-dimensional atomic-layered material is a recent research focus, and single layer Ta2O5 used as gate dielectric in field-effect transistors is obtained via assemblies of Ta2O5 nanosheets. However, the electrical performance is seriously affected by electronic defects existing in Ta2O5. Therefore, spectroscopic ellipsometry is used to calculate the transition energies and corresponding probabilities for two different charged oxygen vacancies, whose existence is revealed by x-ray photoelectron spectroscopy analysis. Spectroscopic ellipsometry fitting also calculates the thickness of single layer Ta2O5, exhibiting good agreement with atomic force microscopy measurement. Nondestructive and noncontact spectroscopic ellipsometry is appropriate for detecting the electrical defects level of single layer Ta2O5.
An analytical model for nanowire junctionless SOI FinFETs with considering three-dimensional coupling effect
Numerical simulation of the magnetoresistance effect controlled by electric field in p-n junction
Effects of Mg substitution on the structural and magnetic properties of Co0.5Ni0.5-xMgxFe2O4 nanoparticle ferrites
Spin-cluster glass state in U(Ga0.95Mn0.05)3
Study of magnetization reversal and anisotropy of single crystalline ultrathin Fe/MgO (001) film by magneto-optic Kerr effect
Magnetic transition behavior of perovskite manganites Nd0.5Sr0.3Ca0.2MnO3 polycrystalline
Apparent directional spectral emissivity determination of semitransparent materials
Effect of co-doped metal caions on the properties of Y2O3:Eu3+ phosphors synthesized by gel-combustion method
Field emission properties of a-C and a-C:H films deposited on silicon surfaces modified with nickel nanoparticles
Graphene/polyaniline composite sponge of three-dimensional porous network structure as supercapacitor electrode
Effects of catalyst height on diamond crystal morphology under high pressure and high temperature
Subsurface defect characterization and laser-induced damage performance of fused silica optics polished with colloidal silica and ceria
This paper mainly focuses on the influence of colloidal silica polishing on the damage performance of fused silica optics. In this paper, nanometer sized colloidal silica and micron sized ceria are used to polish fused silica optics. The colloidal silica polished samples and ceria polished samples exhibit that the root-mean-squared (RMS) average surface roughness values are 0.7 nm and 1.0 nm, respectively. The subsurface defects and damage performance of the polished optics are analyzed and discussed. It is revealed that colloidal silica polishing will introduce much fewer absorptive contaminant elements and subsurface damages especially no trailing indentation fracture. The 355-nm laser damage test reveals that each of the fused silica samples polished with colloidal silica has a much higher damage threshold and lower damage density than ceria polished samples. Colloidal silica polishing is potential in manufacturing high power laser optics.
Aluminum incorporation efficiencies in A-and C-plane AlGaN grown by MOVPE
Computational analysis of the roles of biochemical reactions in anomalous diffusion dynamics
Most biochemical processes in cells are usually modeled by reaction-diffusion (RD) equations. In these RD models, the diffusive process is assumed to be Gaussian. However, a growing number of studies have noted that intracellular diffusion is anomalous at some or all times, which may result from a crowded environment and chemical kinetics. This work aims to computationally study the effects of chemical reactions on the diffusive dynamics of RD systems by using both stochastic and deterministic algorithms. Numerical method to estimate the mean-square displacement (MSD) from a deterministic algorithm is also investigated. Our computational results show that anomalous diffusion can be solely due to chemical reactions. The chemical reactions alone can cause anomalous sub-diffusion in the RD system at some or all times. The time-dependent anomalous diffusion exponent is found to depend on many parameters, including chemical reaction rates, reaction orders, and chemical concentrations.
Effects of Shannon entropy and electric field on polaron in RbCl triangular quantum dot
Analysis and experiments of self-injection magnetron
Extraction of temperature dependences of small-signal model parameters in SiGe HBT HICUM model
Ultra-low specific on-resistance high-voltage vertical double diffusion metal-oxide-semiconductor field-effect transistor with continuous electron accumulation layer
Damage effect and mechanism of the GaAs pseudomorphic high electron mobility transistor induced by the electromagnetic pulse
Damage effect and mechanism of the GaAs high electron mobility transistor induced by high power microwave
Comparison of blue-green response between transmission-mode GaAsP-and GaAs-based photocathodes grown by molecular beam epitaxy
X-ray absorption near-edge structure study on the configuration of Cu2+/histidine complexes at different pH values
A new traffic model on compulsive lane-changing caused by off-ramp
Pedestrian evacuation at the subway station under fire
Effect of supply voltage and body-biasing on single-event transient pulse quenching in bulk fin field-effect-transistor process