SPIN-ORBIT INTERACTION, TRIPLET LIFETIME, AND FINE-STRUCTURE SPLITTING OF EXCITONS IN HIGHLY POROUS SILICON

被引：53

作者：

NASH, KJ ^{[1
]}

CALCOTT, PDJ ^{[1
]}

CANHAM, LT ^{[1
]}

NEEDS, RJ ^{[1
]}

机构：

[1] CAVENDISH LAB, CAMBRIDGE CB3 0HE, ENGLAND

来源：

PHYSICAL REVIEW B | 1995年 / 51卷 / 24期

关键词：

D O I：

10.1103/PhysRevB.51.17698

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a theoretical treatment of the spin-orbit interaction in luminescent porous silicon. We calculate the radiative lifetime of the triplet exciton, which is determined by the spin-orbit interaction, and compare the results with experiment. We discuss previous work on the optically detected magnetic resonance (ODMR) of porous silicon. We show that the spin-orbit interaction causes a substantial fine-structure broadening of the ODMR. Other workers have argued that the large linewidth of the triplet ODMR cannot be explained within the quantum-confinement theory of porous silicon. Our results demonstrate that this argument is incorrect. © 1995 The American Physical Society.

引用

页码：17698 / 17707

页数：10

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