Ultrafast photocurrents and THz generation in single InAs-nanowires

作者：Erhard Nadine^*; Seifert Paul; Prechtel Leonhard; Hertenberger Simon; Karl Helmut; Abstreiter Gerhard; Koblmueller Gregor; Holleitner Alexander W

来源：Annalen der Physik, 2013, 525(1-2): 180-188.

DOI：10.1002/andp.201200181

• Time-resolved optoelectronic nanoscale transport
• InAs nanowire
• THz source

To clarify the ultrafast temporal interplay of the different photocurrent mechanisms occurring in single InAs-nanowire-based circuits, an on-chip photocurrent pump-probe spectroscopy based on coplanar striplines was utilized. The data are interpreted in terms of a photo-thermoelectric current and the transport of photogenerated holes to the electrodes as the dominating ultrafast photocurrent contributions. Moreover, it is shown that THz radiation is generated in the optically excited InAs-nanowires, which is interpreted in terms of a dominating photo-Dember effect. The results are relevant for nanowire-based optoelectronic and photovoltaic applications as well as for the design of nanowire-based THz sources.

• 出版日期2013-2