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Third harmonic generation spectra of degenerate ground state poly(dipropargyl) amines

✍ Scribed by J. McElvain; N. Zhang; C. Halvorson; F. Wudl; A.J. Heeger

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 332 KB
Volume: 232
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(94)01272-w

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✦ Synopsis

We report third harmonic generation (THG) studies on solution-cast thin films of two poly(dipropargyl) amines, poly(Nhexyl dipropargylamine) (PDPHA) and a salt derivative, poly ( dipropargyl-N-hexyl-N-methylammonium triflate) (PDPHMAT), covering pump energies from 0.6 to 1.4 eV. The THG data show the simultaneous two-and three-photon resonance expected for degenerate ground state conjugated polymers at 0.68 eV for PDPHA and 0.73 eV for PDPHMAT. The peak values of the thirdorder susceptibility are 1.0 × 10-1o esu for PDPHA and 2.9 × 10-~ ~ esu for PDPHMAT; off-resonance values are nearly an order of magnitude smaller.

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