Abstract :
Interdigitated photoconductive antennas have been engineered to reach even more of the THz spectrum for pulsed spectroscopy and imaging. One of the main sources of THz radiation, the interdigitated photoconductive antenna, can now be ´tuned´ to THz frequencies that were previously difficult to reach. Researchers at the Ecole Normale Superieure in France found that changing the spacing between the electrodes in the antenna´s structure enables the emission spectrum to be centred at a chosen frequency; a property that will be useful for spectroscopy and imaging, where access to particular parts of the THz spectrum is needed.
