Electromagnetic Stark ladders in waveguide geometries.

Cavity resonances in Josephson ladders

Electromagnetic waves which propagate along a Josephson junction ladder are shown to manifest themselves by resonant steps in the current-voltage characteristics. We report on experimental observation of resonances in ladders of different geometries. The step voltages are mapped on the wave dispersion relation which we derive analytically for the general case of a ladder of arbitrary anisotropy...

Stark ladders as tunable far-infrared emitters

Analytic and Electromagnetic Investigation of Millimeter Wave Membrane Supported CPWs Processed on High Resistivity Silicon

This paper investigates a series of membrane supported millimeter wave transmission lines up to 110 GHz. The structures were fabricated using high resistivity silicon micromachining (wet etching). Three approaches, based on full-wave electromagnetic simulations, analytic closed form equations and equivalent circuit were used in the investigation process. The results were validated by the experi...

Atomic Landau-Zener tunneling and Wannier-Stark ladders in optical potentials.

We calculate the quantum motion of ultracold atoms in an accelerating optical potential, and show how they may be used to observe Landau-Zener tunneling and Wannier-Stark ladders, two fundamental quantum effects in solid state physics. The optical potential is spatially periodic, yielding an energy spectrum of Bloch bands for the atoms. The acceleration provides an inertial force in the moving ...

Numerical Analysis of Photonic Crystal Waveguide

During the last decade, a major research interest is focused on optical sensors for chemical and biosensing application relaying on refractive index (RI) measurements. Among this class of optical sensors the waveguides confined inside of photonic crystals are of high interest. The application of such RI optical sensors is interesting for both gaseous and aqueous samples and includes measurement...