Development of plasmonic metamaterials utilizing organic functional materials

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Conducting polymer polypyrrole and charge-transfer(CT) complex has been investigated as a candidate materials for the development of terahertz(THz) devices. From the THz time-domain spectroscopy(THz-TDS), we have verified that carrier dynamics of dedoped polypyrrole agrees well with localization modified Drude model. Microstripe line for the THz radiation was made on MEH-PPV/TNF film and THz radiation characteristics were tested using THz-TDS system, however, no signal was detected. DBTTF-TCNQ CT transfer crystal show modulation of photocurrent proportional to the applied voltage under illumination with fs lasers.