plane wavesphase velocityacoustic mediumpipeflownonuniform velocityThe phase velocities of plane waves in a pipe filled with a moving acoustic medium are studied for different laws of flow velocity variation along the pipe radius. The wave equation is solved by the discretization method, which breaks...
The mathematically simplest example of wavefronts is that of aplane wave, where the wavefronts are planes. As a physically more realistic example, which is also a quite common case inoptics, we can take aGaussian beam. Figure 1 shows its color-coded complex amplitude profile: ...
The phase velocity of the plane wave is defined as the velocity at which a point of constant phase travels (such as the crest of the wave where the electric field is the maximum). The phase velocity is given by: (3.39)vp=ωk′=ωRe(ωμω). If the permittivity ε is not a functi...
Out-of-plane piezoelectricity and ferroelectricity in layered α-In2Se3 nanoflakes. Nano Lett. 17, 5508–5513 (2017). Article CAS Google Scholar Cui, C. et al. Intercorrelated in-plane and out-of-plane ferroelectricity in ultrathin two-dimensional layered semiconductor In2Se3. Nano Lett. 18...
Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set. Comput. Mater. Sci. 6, 15–50 (1996). Article CAS Google Scholar Dion, M. et al. Van der Waals density functional for general geometries. Phys. Rev. Lett. 92, 246401 (2004)....
Polarization singularities are superpositions of orbital angular momentum (OAM) states in orthogonal circular polarization basis. The intrinsic OAM of light beams arises due to the helical wavefronts of phase singularities. In phase singularities, circulating phase gradients and, in polarization singularitie...
Determine the waveform of the current occurring when a 2μF capacitor has connected across it the half-wave rectified sinusoidal voltage v = 0.32 + 0.5 cos 100t + 0.21 cos 200t V. There will be no current arising from the d.c. term. For the first harmonic the reactance is 1/(2 ×...
A common-path, point-diffraction, phase-shifting interferometer uses a half wave plate having a diffractive element, such as pin hole. A coherent, polarize... WJ Cottrell 被引量: 0发表: 2007年 Plane surface shape measurement method of optical fiber point-diffraction phase-shifting interferometer ...
Comparison of kinoform synthesis methods for image reconstruction in Fourier plane Kinoform is synthesized phase diffractive optical element which allows to reconstruct image by its illumination with plane wave. Kinoforms are used in imag... PA Cheremkhin,NN Evtikhiev,VV Krasnov,... - Spie Photon...
We used projector augmented wave potentials to describe the electron-ion interactions. Simulating cells have a dimension of 9.88 × 9.88 × 33.5 Å3. At finite temperatures, atomic vibrations can break chemical bonds between adjacent atoms, and atoms can jump from one position to...