Large prolongation of free-exciton photoluminescence decay in diamond by two-photon excitation

被引：20

作者：

Kozak, Martin ^{[1
]}

Trojanek, Frantisek ^{[1
]}

Maly, Petr ^{[1
]}

机构：

[1] Charles Univ Prague, Fac Math & Phys, CR-12116 Prague 2, Czech Republic

来源：

OPTICS LETTERS | 2012年 / 37卷 / 11期

关键词：

LUMINESCENCE; ABSORPTION; LIFETIME;

D O I：

10.1364/OL.37.002049

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report on time-resolved photoluminescence of a free-exciton in IIa chemical vapor deposition diamond crystal. Large difference between decay times for one-and two-photon excitation processes was observed. The longest room-temperature exciton photoluminescence lifetime tau(FE) = 220 ns was obtained under two-photon excitation with a photon energy of 4.7 eV. The role of diffusion and surface recombination velocity in exciton photoluminescence dynamics was studied using a new optical method based on two-photon excited time-resolved photoluminescence. The measured room-temperature value of diffusion coefficient in diamond was D = 40 cm(2)/s. (C) 2012 Optical Society of America

引用

页码：2049 / 2051

页数：3

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