Third-order optical nonlinearity in regioregular head-to-tail coupled poly(3-hexylthiophene)

被引：9

作者：

Kawahara, H ^{[1
]}

Ueno, Y ^{[1
]}

Abe, N ^{[1
]}

Kishino, S ^{[1
]}

Ema, K ^{[1
]}

Rikukawa, M ^{[1
]}

Tabuchi, Y ^{[1
]}

Ogata, N ^{[1
]}

机构：

[1] SOPHIA UNIV, DEPT CHEM, CHIYODA KU, TOKYO 102, JAPAN

来源：

OPTICAL REVIEW | 1997年 / 4卷 / 1B期

关键词：

poly(3-hexylthiophene); head-to-tail coupling; conjugation length; Frenkel exciton; third-order nonlinearity;

D O I：

10.1007/BF02931678

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We measured the third-order optical nonlinearity of regioregular head-to-tail coupled poly (3-hexylthiophene) (HT-PHT) and regiorandom poly (3-hexylthiophene) (R-PHT) around exciton resonance using degenerate four wave mixing. The observed value of \chi((3))\ at the exciton resonance peak of HT-PHT is in the order of 10(-9) esu which is approximately three-fold larger than that of R-PHT. We observed for the first time the enhancement in optical nonlinearity that occurs through the control of regularity of the polymeric structure. Response time of the nonlinearity was also measured using the transient grating method. The decay time of the transient grating in R-PHT and HT-PHT was less than 2 ps.

引用

页码：188 / 190

页数：3

共 10 条

[1] REGIOCONTROLLED SYNTHESIS OF POLY(3-ALKYLTHIOPHENES) MEDIATED BY RIEKE ZINC - THEIR CHARACTERIZATION AND SOLID-STATE PROPERTIES [J].