Delayed release of Li atoms from laser ablated lithium niobate

被引：15

作者：

Chaos, JA ^{[1
]}

Dreyfus, RW ^{[1
]}

Perea, A ^{[1
]}

Serna, R ^{[1
]}

Gonzalo, J ^{[1
]}

Afonso, CN ^{[1
]}

机构：

[1] CSIC, Inst Opt, E-28006 Madrid, Spain

来源：

APPLIED PHYSICS LETTERS | 2000年 / 76卷 / 05期

关键词：

D O I：

10.1063/1.125847

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The present vapor-phase optical (atomic) absorption measurements study the escape dynamics of Li atoms from a LiNbO3 target surface upon laser ablation in vacuum. The objective is to understand the low-Li content of LiNbO3 films prepared by pulsed laser deposition. A primary result is a delayed release of Li atoms, 2-20 mu s after the laser pulse; they eject with a velocity of 6x10(5) cm s(-1), which is consistent with an electronic ejection mechanism. The long emission period means there are almost no intraplume Li collisions in the gas phase and no forward focusing of the delayed released atoms. This appears to explain the low-Li content usually found in films grown in the normal direction. (C) 2000 American Institute of Physics. [S0003-6951(00)04605-2].

引用

页码：649 / 651

页数：3

共 17 条

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