Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2006 · 58 citations · 9 references
Natural SciencesMaterials SciencePhysicsOptical MaterialsOpticsOptoelectronicsFourier Transform SpectroscopyInfrared SpectroscopyOptical Properties Of MaterialsOptical Properties Of SolidsOptical SpectroscopyTerahertz SpectroscopyArtificial DielectricsDielectric Optical MaterialsGas LasersReflectanceTerahertz Material CharacterizationTerahertz OscillatorsTerahertz Spectral AnalysisTerahertz Waves
As short range, ground based, surveillance systems operating at terahertz frequencies continue to evolve, increasing attention is being directed towards the behavior of dielectric materials at terahertz frequencies as well as the behavior of optical components used to control terahertz radiation. This work provides an overview of several terahertz optical components such as frequency selective filters, laser output couplers, artificial dielectrics, and electromagnetic absorbers. In addition, a database was established that contains terahertz properties of common materials that have been largely unexplored in this region of the spectrum. The database consists of transmittance and reflectance spectra of a variety of materials measured using Fourier transform infrared spectroscopy techniques from 175 GHz - 2 THz. In addition, ultra-stable, CO<sub>2</sub> optically pumped, far-infrared gas lasers were used to collect fixed-frequency transmittance data at 326 GHz, 584 GHz, and 1.04 THz. A Gunn oscillator was used for measurements at 94 GHz.
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Resonant metal-mesh bandpass filters for the far infrared
David W. Porterfield, Jeffrey L. Hesler, R. Densing et al. · Applied Optics · 1994 · 151 citations