Negative refraction and the spectral filtering of terahertz radiation by a photonic crystal prism

We demonstrate how micromachined photonic crystals can be used to negatively refract terahertz frequency light. The photonic crystals, which are constructed from conventional dielectric materials, manipulate the incident beam via interaction with their photonic bands. Consequently, we show that different components of a broadband beam incident on the structure may be positively or negatively refracted, depending upon its frequency and that the structure can be used as an effective spectral filter of THz radiation

Terahertz spectroscopy of polyaromatic hydrocarbons

In this work we are beginning to determine the terahertz dielectric properties of various polyaromatic hydrocarbons. Terahertz spectroscopy of such organic compounds has seen rather less work undertaken in recent years than that carried out in some other areas

Negatively refracting plasmonic devices at THz frequencies

In this paper, we present experimental results showing how appropriately designed and constructed artificial materials can be used to refract negatively terahertz frequency light without the need for the materials to have both a negative permeability and a negative permittivity