Electromagnetic toroidal excitations in matter and free space
... telecommunications to information processing and data storage; from spectroscopy and imaging to light-assisted manufacturing. Our understanding and description of the electromagnetic properties of matter traditionally involves the concept of electric and magnetic dipoles, as well as their more compl ...
... telecommunications to information processing and data storage; from spectroscopy and imaging to light-assisted manufacturing. Our understanding and description of the electromagnetic properties of matter traditionally involves the concept of electric and magnetic dipoles, as well as their more compl ...
Waveguides Waveguides, like transmission lines, are structures
... electromagnetic waves from point to point. However, the fundamental characteristics of waveguide and transmission line waves (modes) are quite different. The differences in these modes result from the basic differences in geometry for a transmission line and a waveguide. Waveguides can be generally ...
... electromagnetic waves from point to point. However, the fundamental characteristics of waveguide and transmission line waves (modes) are quite different. The differences in these modes result from the basic differences in geometry for a transmission line and a waveguide. Waveguides can be generally ...
Tunnelling ionization of deep centres in high
... absorption of the terahertz radiation due to the low concentration of free carriers (the carriers are frozen out on the centres), as well as to the use of short nanosecond-range pulses which do not substantially perturb the phonon system. The observation of tunnelling ionization of deep impurities b ...
... absorption of the terahertz radiation due to the low concentration of free carriers (the carriers are frozen out on the centres), as well as to the use of short nanosecond-range pulses which do not substantially perturb the phonon system. The observation of tunnelling ionization of deep impurities b ...
- TDDFT.org
... Photovoltaics represent one of the most important sustainable energy sources today, and are expected to play an essential role in the future evolution of the world’s energy supply. The solar cell marketis still dominated by multicrystalline silicon, despite competition from thin-film solar cells mad ...
... Photovoltaics represent one of the most important sustainable energy sources today, and are expected to play an essential role in the future evolution of the world’s energy supply. The solar cell marketis still dominated by multicrystalline silicon, despite competition from thin-film solar cells mad ...
Elements of Simulation
... Radiation Patterns of Antennas • Electric field intensity is a function of the radial distance and the angle from the antenna • A radiation pattern can be plotted to show field strength (shown as a radial distance) vs angle • The angle between half-power points (denoted as HPBW) is a measure of the ...
... Radiation Patterns of Antennas • Electric field intensity is a function of the radial distance and the angle from the antenna • A radiation pattern can be plotted to show field strength (shown as a radial distance) vs angle • The angle between half-power points (denoted as HPBW) is a measure of the ...
Dielectric
A dielectric material (dielectric for short) is an electrical insulator that can be polarized by an applied electric field. When a dielectric is placed in an electric field, electric charges do not flow through the material as they do in a conductor, but only slightly shift from their average equilibrium positions causing dielectric polarization. Because of dielectric polarization, positive charges are displaced toward the field and negative charges shift in the opposite direction. This creates an internal electric field that reduces the overall field within the dielectric itself. If a dielectric is composed of weakly bonded molecules, those molecules not only become polarized, but also reorient so that their symmetry axes align to the field.The study of dielectric properties concerns storage and dissipation of electric and magnetic energy in materials. Dielectrics are important for explaining various phenomena in electronics, optics, and solid-state physics.