Observation of both second-harmonic and multiphoton-absorption-induced luminescence in ZnO

Author

Dai, D.C. ; Xu, S.J. ; Shi, S.L. ; Xie, M.H. ; Che, C.M.

Author_Institution

Dept. of Phys., Durham Univ., UK

Volume

18

Issue

14

fYear

2006

fDate

7/1/2006 12:00:00 AM

Firstpage

1533

Lastpage

1535

Abstract

The confusion over second-harmonic generation (SHG) and multiphoton-absorption (MPA)-induced luminescence in ZnO is observed under excitation with femtosecond laser between 800 and 1000 nm at room temperature. Excitation power dependence measurements show SHG is a two-photon process, and MPA is a three- or four-photon process. These are confirmed with interferometric pulse autocorrelation experiments. Excitation power density is a main regulatory factor for this confusion.

Keywords

II-VI semiconductors; high-speed optical techniques; light interferometry; multiphoton processes; optical harmonic generation; optical materials; photoexcitation; photoluminescence; wide band gap semiconductors; zinc compounds; 800 to 1000 nm; ZnO; excitation power density; interferometric pulse autocorrelation; luminescence; multiphoton-absorption; second-harmonic generation; two-photon process; Absorption; Autocorrelation; Laser excitation; Luminescence; Optical materials; Photonic band gap; Power measurement; Temperature; Ultrafast optics; Zinc oxide; Interferometric autocorrelation; luminescence; multiphoton absorption (MPA); second-harmonic generation (SHG); zinc oxide (ZnO);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2006.877620

Filename

1650271