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Observation of two-photon-induced photoluminescence in ZnO microtubes
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10.1063/1.1996848
/content/aip/journal/apl/87/5/10.1063/1.1996848
http://aip.metastore.ingenta.com/content/aip/journal/apl/87/5/10.1063/1.1996848
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Figures

Image of FIG. 1.
FIG. 1.

Morphology of tubular ZnO. (a) Scanning electron microscopy and (b) high-resolution transmission electron microscopy morphology of a single ZnO tube, bar: ; (c) the edge of a ZnO tube; (d) electron diffraction pattern shows a wurtzite single-crystalline structure.

Image of FIG. 2.
FIG. 2.

Micro-Raman spectrum of a single ZnO microtube.

Image of FIG. 3.
FIG. 3.

(Color online) (a) PL spectra at different excitation wavelengths. The inset shows a weak PL peak at . (b) The dependence of the photon energy (the solid circles) and the intensity (the open squares) of the PL peak on the excitation wavelength.

Image of FIG. 4.
FIG. 4.

(Color online) (a) Two-photon-induced PL spectra excited by nanosecond beam at different excitation powers, the inset is a schematic diagram of the electron transitions. (b) The intensity of PL emission at vs the square of the average excitation power.

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/content/aip/journal/apl/87/5/10.1063/1.1996848
2005-07-29
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Observation of two-photon-induced photoluminescence in ZnO microtubes
http://aip.metastore.ingenta.com/content/aip/journal/apl/87/5/10.1063/1.1996848
10.1063/1.1996848
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