Terahertz line detection by a microlens array coupled photoconductive antenna array.
We present THz ultrashort pulse detection by a photoconductive antenna array consisting of 16 photoconductive antennas. The efficient excitation of the photoconductive antennas has been realized by a microlens array which generates 16 single spots from the exciting fs-laser beam. This combination of optoelectronics and microoptics improves the detection efficiency by an order of magnitude in comparison to an excitation by a line focus.
Pradarutti
B
B
Fraunhofer Institute for Applied Optics and Precision Engineering IOF, Jena, Germany. boris.pradarutti@iof.fraunhofer.de
Müller
R
R
Freese
W
W
Matthäus
G
G
Riehemann
S
S
Notni
G
G
Nolte
S
S
Tünnermann
A
A