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

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

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 th...

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Veröffentlicht in:IEEE photonics technology letters 2006-07, Vol.18 (14), p.1533-1535
Hauptverfasser: Dai, D.C., Xu, S.J., Shi, S.L., Xie, M.H., Che, C.M.
Format: Artikel
Sprache:eng
Schlagworte:
Absorption
Autocorrelation
Confusion
Density
Excitation
Femtosecond
Interferometric autocorrelation
Laser excitation
Lasers
Luminescence
multiphoton absorption (MPA)
Optical materials
Photonic band gap
Power measurement
second-harmonic generation (SHG)
Temperature
Ultrafast optics
Zinc oxide
zinc oxide (ZnO)
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Zusammenfassung: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.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2006.877620