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Conversion from static electric fields to periodic terahertz waves has been experimentally demonstrated at 0.38THz using an optically controlled array of coplanar strip lines on a semi-insulator GaAs substrate.
In order to develop a Terahertz (THz) video-camera for human security scanning we investigated the spectroscopic properties of different textile materials. THz time domain spectroscopy (TDS) measurements were performed.
A high-speed travelling-wave photodetector (TWPD) with an InGaAs absorber was designed and realized. The bandwidth of the TWPD was measured as 210GHz using electro-optic sampling techniques. This kind of device can be used for THz photomixer
This paper highlights the issue of variable power fibre-coupling in THz-TDS systems and suggests an effective subtraction approach to remove this dependence and return a useful signal.
We report on the development and testing of fiber-coupled, LT-GaAs photomixers operating at cryogenic temperatures which are designed for variable temperature terahertz spectroscopy of chemical, electronic and magnetic materials.
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