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DPG

Berlin 2001 – wissenschaftliches Programm

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Q: Quantenoptik

Q 23: Poster: Application of Short Pulses

Q 23.3: Poster

Donnerstag, 5. April 2001, 12:30–15:00, AT2

Characterization of Plastic Materials in the Terahertz Frequency Range
— •Jianxin Zhao and Hermann Harde

Universität der Bundeswehr Hamburg
Lasertechnik und Werkstoffkunde, Germany

We have used the powerful technique of THz time-domain spectroscopy to characterize plastics (plastomeres and duromeres). Herewith high-precision continuous spectra of the absorption coefficient and refractive index are provided. The distinct higher absorption of the polar materials polyvinylchlorid and polyamid at THz-frequencies is compared with the nonpolar polymers polytetrafluorethylen (Teflon) and polyethylen. The measurements are compared with calculations based on the Debye theory and the new molecular response theory1,2 to evaluate the relevant parameters describing the molecular polarization.

1. H. Harde, R. A. Cheville, D. Grischkowsky, J. Phys. Chem. A

101, 3646-3660 (1997)
2. H. Harde, R. A. Cheville, D. Grischkowsky, J. Opt. Soc. Am. B

14, 3282-3293 (1997)

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