Research

  • Photoconductive Antenna for Generation and Detection of Terahertz Radiation

    Research Topics

    The photoconductive antenna can radiate a broadband terahertz wave with relatively high efficiency. Conventional design methods have used the simple analysis model of a dipole antenna in open space filled by an equivalent dielectric material. As the model size becomes large, the analysis of the full model becomes time-consuming and cumbersome. However, it is necessary to evaluate a more exact analysis model for the precise array design. This research presents the analysis of the single dipole element located at the interface between a half-free space and a dielectric material as the first step of the design. A perfectly matched layer (PML) is used for the calculation of the frequency spectrum. The antennas are manufactured by super-fine ink jet technology, and the frequency spectra are measured by terahertz time-domain spectroscopy.

    1. Katsunari Irie, Mikio Saigusa, Keisuke Takano, Masanori Hangyo, John Young, Kohji Yamamoto, Masahiko Tani, Takehito Suzuki, "Analysis and Estimation of Spectrum Characteristics for Dipole Photoconductive Antenna that includes Photocurrent and Receiving Antenna Effects," IRMMW-THz, Tue-C-2-4, Wollongong, Australia, Sep. 23-28, 2012.
    2. Katsunari Irie, Mikio Saigusa, Keisuke Takano, Masanori Hangyo, John Young, Kohji Yamamoto, Masahiko Tani, Takehito Suzuki, "Analysis and Estimation of Spectrum Characteristics for Dipole Photoconductive Antenna including Photocurrent and Receiving Antenna ," The 59th Spring Meeting, 2012; The Japan Society of Applied Physics and Related Societies, 17p-E8-10, Waseda University, Mar. 2012.
    3 . Katsunari Irie, Keisuke Takano, Masanori Hangyo, Kohji Yamamoto, Masahiko Tani, Takehito Suzuki, eeFrequency Spectrum on Photoconductive Antenna from Analysis including Dielectric Layer and Substrate Lens,ff The 16th Conference of IEICE Student Activity Committee, Tokyo Section, pp.61, March 12, 2011.