ENHANCEMENT OF 3RD-ORDER OPTICAL NONLINEARITY OF POLY(ARYLENEETHYNYLENE)S BY INTRODUCING AN INTRAMOLECULAR CHARGE-TRANSFER INTERACTION INTO THEIR PI-CONJUGATION

被引：11

作者：

OOBA, N ^{[1
]}

TOMARU, S ^{[1
]}

KURIHARA, T ^{[1
]}

KAINO, T ^{[1
]}

YAMADA, W ^{[1
]}

TAKAGI, M ^{[1
]}

YAMAMOTO, T ^{[1
]}

机构：

[1] TOKYO INST TECHNOL, RESOURCES UTILIZAT RES LAB, YOKOHAMA, KANAGAWA 227, JAPAN

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 1995年 / 34卷 / 6A期

关键词：

NONLINEAR OPTICS; 3RD-HARMONIC GENERATION; PI-CONJUGATED POLYMER; POLY (ARYLENEETHYNYLENE); INTRAMOLECULAR; CHARGE TRANSFER;

D O I：

10.1143/JJAP.34.3139

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Poly(aryleneethynylene) type pi-conjugated polymers (PAEs) are synthesized and the third-order optical susceptibility ((3)(chi)) of their thin films is evaluated. There is a red-shift in the electronic absorption of the PAE caused by an intramolecular charge transfer (CT) interaction when pi-electron excessive heteroaromatic rings are introduced into the pi-conjugation. The ((3)(chi)) value of the PAEs is enhanced by increasing the CT interaction and reaches more than 10(-11) esu in the near resonant region. The increase in the pi-electron delocalization caused by the CT interaction is found to be the main factor enhancing ((3)(chi)). This introduction of a CT interaction into a pi-conjugation is an effective concept for the design of large ((3)(chi)) materials.

引用

页码：3139 / 3141

页数：3

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