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Terahertz emission from vertically aligned InN nanorod arrays
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10.1063/1.2789183
/content/aip/journal/apl/91/13/10.1063/1.2789183
http://aip.metastore.ingenta.com/content/aip/journal/apl/91/13/10.1063/1.2789183
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Figures

Image of FIG. 1.
FIG. 1.

(Color online) SEM images of vertically aligned (a) low-temperature-grown nanorods (LT-NRs) and (b) high-temperature-grown InN nanorods (HT-NRs), grown on Si(111) substrates by nitrogen-plasma-assisted molecule beam epitaxy. LT-NR has a uniform radius of , while that of the HT-InN nanorods reveals a bimodal size distribution.

Image of FIG. 2.
FIG. 2.

(Color online) (a) Terahertz waveform generated from -type InN film (blue), HT- (red), and LT-NRs (black), respectively. Each sample is excited at the fluence of . (b) Peak amplitude of terahertz emission for InN film (solid squares), HT- (open circles), and LT-NRs (solid circles) as a function of laser pump power. Terahertz emissions from HT-NR and InN film begin to be nearly saturated from the low excitation level, while that from LT-NR keeps increasing with the excitation energy.

Image of FIG. 3.
FIG. 3.

(Color online) Optical reflectivities in HT-NR (open circles), LT-NR (solid circles), and InN film (solid squares) as a function of excitation energy. Optical absorption in InN film is about 80%, while that in nanorods is about 95%.

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/content/aip/journal/apl/91/13/10.1063/1.2789183
2007-09-27
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Terahertz emission from vertically aligned InN nanorod arrays
http://aip.metastore.ingenta.com/content/aip/journal/apl/91/13/10.1063/1.2789183
10.1063/1.2789183
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