A Rectangular Dielectric Resonator Antenna (RDRA) is theoretically analyzed using the Conventional Dielectric Waveguide Model (CDWM), numerically simulated using the High Frequency Structure Simulator (HFSS) based on the Finite Element Method (FEM) software package and experimentally investigated with the consideration of the fundamental mode TE 111. Antenna parameters under investigation inclu...

A large-area planar spiral antenna has been installed on the linear laboratory device VINETA. For low radio-frequency (RF ) powers the induction coil is operated in the inductive discharge mode with typical plasma densities of n ≈ 1 · 10 m and electron temperatures of Te ≈ 5 eV. At higher RFpowers a transition to the helicon wave sustained discharge mode is observed, in which the density increa...

Centimeter-sized Te-doped GaSe ingots were grown from the charge compositions of GaSe with nominals 0.05, 0.1, 0.5, 1, and 3 mass% Te, which were identified as ε-GaSe:Te (0.01, 0.07, 0.38, 0.67, and 2.07 mass%) single crystals. The evolution of the absorption peaks of the phonon modes E'(2) (≈ 0.584 THz) and E"(2) (1.77 THz) on Te-doping in GaSe:Te crystals was studied by THz time-domain spectr...

Optical intersubband transitions (ISTs) for both in-plane polarization (TE) and normalto-plane polarization (TM) in p-type Si1-xGex/Si multiple quantum wells (MQWs) are investigated using 14-band k⋅p model combined with the envelope-function Fourier expansion method. The results show that the amplitudes of different intersubband transitions for TE and TM polarizations, and the overall absorptio...

width of less than or equal to 8 pm operate in a single mode, but the waveguides with a core width of more than 8 pm operate in multiple modes. Figure 3 shows the dependence of optical loss on core width. The optical loss is constant for TE polarized incident light, even though the core width increases. On the other hand, the optical loss decreases with increasing core width for TM polarized in...

Facing with the increasing capacity requirements of on-chip optical interconnects, mode division multiplexing technology (MDM), which leverages different spatial eigenmodes at same wavelength as independent channels to transmit signals, has attracted tremendous interest. Mode-order converters that can convert fundamental high-order modes are key components in MDM systems. However, it is still v...

This paper proposed an X-band compact efficient rectangular waveguide TE 10 -circular 01 mode converter and conducted its structure design, theoretical analysis, numerical simulation, experimental research. is composed of a –TE 20 converter. In the design converter, step used to counteract microwave reflection due discontinuity rectangular–circular connection, two choke slots are involved suppr...

Hybrid plasmonic waveguides consisting of a metal plane separated from a high-index medium by a low-index spacer have recently attracted much interest. Here we show that, by suitably choosing the dimensions and material properties of the hybrid waveguide, a very compact and broadband TE-pass polarizer can be implemented. Finite-difference time-domain simulation indicates that the proposed devic...

We point out that 2D photonic crystals (PhCs) can support surface bands that are pinned to Dirac points. These bands can be made very flat by optimizing the parameters of the system. Surface modes are found at the interface of two different cladding materials: one is a PhC with Dirac linear dispersion for the TE mode, and the other is a PhC that has a broad TE gap at the Dirac frequency.