Related Experiment Video
Updated: May 25, 2026
Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
Published on: July 8, 2013
THz generation at 1.55 µm excitation: six-fold increase in THz conversion efficiency by separated photoconductive and
Roman J B Dietz1, Marina Gerhard, Dennis Stanze
1Fraunhofer Instiute for Telecommunications, Heinrich-Hertz-Institute, Berlin, Germany. Roman.Dietz@hhi.fraunhofer.de
Abstract:
We present first results on photoconductive THz emitters for 1.55µm excitation. The emitters are based on MBE grown In0.53Ga0.47As/In0.52Al0.48As multilayer heterostructures (MLHS) with high carrier mobility. The high mobility is achieved by spatial separation of photoconductive and trapping regions. Photoconductive antennas made of these MLHS are evaluated as THz emitters in a THz time domain spectrometer (THz TDS). The high carrier mobility and effective absorption significantly increases the optical-to-THz conversion efficiency with THz bandwidth in excess of 3 THz.
