Details

Autor(en) / Beteiligte

• Singh, Abhishek
• Winnerl, Stephan
• König-Otto, Jacob C
• Stephan, Daniel R
• Helm, Manfred
• Schneider, Harald

Titel

Plasmonic efficiency enhancement at the anode of strip line photoconductive terahertz emitters

Ist Teil von

• Optics express, 2016-10, Vol.24 (20), p.22628-22634

Ort / Verlag

United States

Erscheinungsjahr

2016

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• We investigate strip line photoconductive terahertz (THz) emitters in a regime where both the direct emission of accelerated carriers in the semiconductor and the antenna-mediated emission from the strip line play a significant role. In particular, asymmetric strip line structures are studied. The widths of the two electrodes have been varied from 2 µm to 50 µm. The THz emission efficiency is observed to increase linearly with the width of the anode, which acts here as a plasmonic antenna giving rise to enhanced THz emission. In contrast, the cathode width does not play any significant role on THz emission efficiency.