Multiphoton-absorption induced ultraviolet luminescence of ZnO nanorods using low-energy femtosecond pulses

被引：19

作者：

Das, Susanta Kumar ^{[1
]}

Biswas, Mahua ^{[2
]}

Byrne, Daragh ^{[2
]}

Bock, Martin ^{[1
]}

McGlynn, Enda ^{[2
]}

Breusing, Markus ^{[1
]}

Grunwald, Ruediger ^{[1
]}

机构：

[1] Max Born Inst Nichtlineare Opt & Kurzzeitspektros, D-12489 Berlin, Germany

[2] Dublin City Univ, Sch Phys Sci, NCPST, Dublin 9, Ireland

来源：

JOURNAL OF APPLIED PHYSICS | 2010年 / 108卷 / 04期

基金：

爱尔兰科学基金会;

关键词：

ROOM-TEMPERATURE; CRYSTALS; ARRAYS; ROUTE;

D O I：

10.1063/1.3468632

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Multiphoton-absorption (MPA) induced ultraviolet (UV) luminescence of ZnO nanorods grown by vapor phase transport was demonstrated using ultrafast excitation at pulse energies in the few nanojoules range, directly generated by a Ti:sapphire laser oscillator at wavelengths around 800 nm. The dependence of the UV luminescence on the excitation density reveals a two-photon absorption process as the responsible excitation mechanism. The broad spectral bandwidth of the excitation pulses obviously promotes the feasibility of the observed two-photon channel. Theoretical estimates concerning the contribution of nonlinear absorbance strongly support the experimental findings. The essential conditions for proper utilization of this process are discussed. (C) 2010 American Institute of Physics. [doi:10.1063/1.3468632]

引用

页数：6

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