Novel THz-Frequency Spectrometers by Integrating Widely-Tunable Monochromatic THz Sources and Detectors, or Arrays of Emitters and Detectors, with Photonic Bandgap Crystals

摘要

We have successfully carried out our Phase-I research by achieving most of the Phase-I objectives. First, we have significantly extended the tuning range of our THz source and increased the output peak powers. Second, we have used our tunable THz source to measure the absorption spectra of several chemicals in the vapor phase, and therefore, we have demonstrated the feasibility of fingerprinting molecules. Third, we have used our tunable THz source to take a THz picture of an object (proof of principle). Fourth, we have observed up-conversion process, which can be used as a new detection scheme for THz waves at room temperature. Finally, we have systematically investigated unique THz properties of photonic crystals.