ROOM-TEMPERATURE SPECTRAL HOLE-BURNING AND ELIMINATION OF PHOTODARKENING IN SOL-GEL DERIVED CDS QUANTUM DOTS

被引：45

作者：

KANG, K ^{[1
]}

KEPNER, AD ^{[1
]}

HU, YZ ^{[1
]}

KOCH, SW ^{[1
]}

PEYGHAMBARIAN, N ^{[1
]}

LI, CY ^{[1
]}

TAKADA, T ^{[1
]}

KAO, Y ^{[1
]}

MACKENZIE, JD ^{[1
]}

机构：

[1] UNIV CALIF LOS ANGELES,DEPT MAT SCI & ENGN,LOS ANGELES,CA 90024

来源：

APPLIED PHYSICS LETTERS | 1994年 / 64卷 / 12期

关键词：

D O I：

10.1063/1.111867

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Spectral hole burning at room temperature is used as a technique to compare optical nonlinearities of semiconductor quantum dot materials prepared by the sol-gel and glass fusion techniques. In an effort to understand the mechanism of photodarkening in quantum dots and assess its effect on optical nonlinearities, we prepared and characterized three representative samples with similar dot sizes. We found that photodarkening can be reduced substantially by controlling the media surrounding the dots. The sol-gel derived samples with 80 wt % SiO2 do not exhibit appreciable photodarkening while the melt-quenched glasses with 56 wt % SiO2 exhibit strong photodarkening effects at room temperature which results in reduction of their optical nonlinearity by a factor of congruent-to 20 compared with the sol-gel derived samples.

引用

页码：1487 / 1489

页数：3