NONLINEAR OPTICAL SPECTROSCOPY OF CORRELATED PI-ELECTRONS IN A ONE-DIMENSIONAL SEMICONDUCTOR

被引：33

作者：

TOWNSEND, PD

FANN, WS

ETEMAD, S

BAKER, GL

SOOS, ZG

MCWILLIAMS, PCM

机构：

[1] BELLCORE,RED BANK,NJ 07701

[2] PRINCETON UNIV,DEPT CHEM,PRINCETON,NJ 08544

来源：

CHEMICAL PHYSICS LETTERS | 1991年 / 180卷 / 05期

关键词：

D O I：

10.1016/0009-2614(91)85155-P

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We present a joint experimental and theoretical study of the non-linear optical (NLO) spectroscopy of correlated pi-electrons in a conjugated polymer. Spectra of two NLO coefficients, the third harmonic generation efficiency (THG) and two-photon absorption (TPA) cross-section, are reported using polydiacetylene-4BCMU. The THG spectrum is dominated by states near the optical gap (E(g)), similar to the behavior seen in the linear absorption spectrum, but the TPA onsets below E(g) and its spectrum is dominated by states well above it. These experimental spectra are accounted for by exact calculations based on correlated electrons model of a conjugated polymer.

引用

页码：485 / 489

页数：5

共 21 条

[1]

AGARWAL GP, 1985, PHYS REV B, V17, P776

[2]

BAKER GL, 1987, P SOC PHOTOOPT INSTR, V824, P102

[3] 3-WAVE MIXING IN CONJUGATED POLYMER-SOLUTIONS - 2-PHOTON ABSORPTION IN POLYDIACETYLENES [J].