Wavevector-dependent optical properties from wavevector-independent proper conductivity tensor

Wavevector-Dependent Susceptibility in Z-Invariant Pentagrid Ising Model

We study the q-dependent susceptibility χ(q) of a Z-invariant ferromagnetic Ising model on a Penrose tiling, as first introduced by Korepin using de Bruijn’s pentagrid for the rapidity lines. The pair-correlation function for this model can be calculated exactly using the quadratic difference equations from our previous papers. Its Fourier transform χ(q) is studied using a novel way to calculat...

Wavevector Selective Metasurfaces and Tunnel Vision Filters

Metasurfaces offer unprecedented flexibility in the design and control of light propagation, replacing bulk optical components and exhibiting exotic optical effects. One of the basic properties of the metasurfaces, which renders them as frequency selective surfaces, is the ability to transmit or reflect radiation within a narrow frequency band that can be engineered on demand. Here we introduce...

Strong wavevector dependence of hole transport in heterostructures

Heterostructures such as resonant tunneling diodes, quantum well photodetectors and lasers, and cascade lasers break the symmetry of the crystalline lattice. Such break in lattice symmetry causes a strong interaction of heavy-, lightand split-off hole bands. A resonant tunneling diode is used as a vehicle to study hole transport in heterostructures including the subband dispersion transverse to...

Finite - wavevector phonon coupling to degenerate electronic states in La

Finite-Difference Complex Wavevector Band Structure Solver for Nanophotonics Applications

A two-dimensional finite-difference complex wavevector band structure solver for nanophotonics applications is presented, and rigorous computation of modal properties within bandgaps of periodic devices, including mirror strength, is shown. OCIS codes: (000.4430) Numerical approximation and analysis; (050.1755) Computational electromagnetic methods; (130.3120) Integrated optics devices.