Multiphoton excitation of quantum dots by ultrashort and ultraintense laser pulses

被引：13

作者：

Fu, Y. ^{[1
]}

Han, T. -T. ^{[1
]}

Luo, Y. ^{[1
]}

Agren, H. ^{[1
]}

机构：

[1] Royal Inst Technol, Sch Biotechnol, Dept Theoret Chem, AlbaNova, S-10691 Stockholm, Sweden

来源：

APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 22期

关键词：

D O I：

10.1063/1.2209209

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Multiphoton optical processes in semiconductor quantum dots (QDs) excited by ultrafast (femtosecond) and ultraintense (GW/cm(2)) lasers are considered as the ultimate tags for cellular bioimaging. By solving the time-dependent Schrodinger equation unperturbatively, experimentally observed strong multiphoton excitation is reproduced when optical transitions among all confined states and a few hundred more extended states are taken into account. Model calculations indicate a significant excitation of a CdS QD of 3.7 nm in radius by a 100 fs laser pulse with a 10 GW/cm(2) peak optical power. The excitation rate is almost constant between 1300 and 560 nm, a useful region for bioimaging. (c) 2006 American Institute of Physics.

引用

页数：3

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