K. Kan1, J. Yang1, A. Ogata1, S. Sakakihara1, T. Kondoh1, K. Norizawa1, I. Nozawa1, T. Toigawa1, Y. Yoshida1, H. Kitahara2, K. Takano2, M. Hangyo2, R. Kuroda3, and H. Toyokawa3
1Institute of Scientific and Industrial Research (ISIR), Osaka University, Osaka 567-0047, Japan
2Institute of Laser Engineering (ILE), Osaka University, Osaka 565-0871, Japan
3National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki 305-8568, Japan
2Institute of Laser Engineering (ILE), Osaka University, Osaka 565-0871, Japan
3National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki 305-8568, Japan
The generation of radially polarized terahertz (THz) waves from a photoconductive antenna (PCA) with radial microstructures was investigated. Microstructured electrodes with 10 μm lines and spaces were fabricated on a semi-insulating InP wafer using photolithography. The PCA with three layers was driven by an amplified femtosecond laser and DC power supply. Radially polarized THz waves from the PCA were measured by a Michelson interferometer with a 4.2 K silicon bolometer. The polarization components of THz waves were analyzed by a wire grid polarizer.
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