NEAR-RESONANT REFRACTIVE NONLINEARITY IN POLYDIACETYLENE 9-BCMU THIN-FILMS

被引：36

作者：

MOLYNEUX, S ^{[1
]}

KAR, AK ^{[1
]}

WHERRETT, BS ^{[1
]}

AXON, TL ^{[1
]}

BLOOR, D ^{[1
]}

机构：

[1] UNIV DURHAM,DEPT PHYS,DURHAM DH1 3LE,ENGLAND

来源：

OPTICS LETTERS | 1993年 / 18卷 / 24期

关键词：

D O I：

10.1364/OL.18.002093

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The spectral dependence of the third-order nonlinear susceptibility chi(3) (omega; omega, -omega, omega) of the polydiacetylene 9-BCMU has been measured, and the imaginary component is found to change sign in the exciton absorption tail. In the red-phase material, a significant refractive nonlinearity was observed around the 1.93-eV input energy range, whereas the absorption change was too small to quantify. A magnitude for the nonlinear refractive index coefficient \n2\ = 1.9 (+/-1.0) X 10(-10) cm2 W-1 Was Measured at this Im chi(3) = 0 position, indicating good figures of merit for all-optical switching.

引用

页码：2093 / 2095

页数：3

共 15 条

[1]

AXON TL, 1993, P SOC PHOTO-OPT INST, V2025, P44

[2] THE PICOSECOND SPECTROSCOPY OF A POLYDIACETYLENE IN THE SMALL-SIGNAL LIMIT - DETECTION AND CHARACTERIZATION OF A NEW LONG-LIVED STATE [J].