Electrical characterization of conducting polypyrrole by THz time-domain spectroscopy

Jeon, Tae-In; Tae-In Jeon; Grischkowsky, D.; Mukherjee, A. K.; Mukherjee, A.K.; Menon, Reghu
October 2000
Applied Physics Letters;10/16/2000, Vol. 77 Issue 16
Academic Journal
Using an optoelectronic THz beam system for THz time-domain spectroscopy (THz TDS), we have measured the absorption and index of refraction of a conducting polypyrrole film from low frequencies to 2.5 THz. From these measurements, the dc conductivity of 215/(Ω cm) and the complex conductance were obtained over this frequency range. All of the results were well fit by Drude theory, which gives a carrier scattering time of only 12.6 fs, less than 1/10 that of the semiconductors, thereby illustrating the disorder and low mobility of the polymer. © 2000 American Institute of Physics.


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