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Strain relaxation induced microphotoluminescence characteristics of a single InGaN-based nanopillar fabricated by focused ion beam milling
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10.1063/1.2965461
/content/aip/journal/apl/93/8/10.1063/1.2965461
http://aip.metastore.ingenta.com/content/aip/journal/apl/93/8/10.1063/1.2965461
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Schematic of the epitaxial structure and the deposited materials for nanopillar fabrication using a focused ion beam. (b) The field-emission scanning-electron micrographic (FESEM) image of the fabricated freestanding nanopillar with a diameter of and a length of .

Image of FIG. 2.
FIG. 2.

(a) The measured microphotoluminescence spectrum from the freestanding nanopillar with the Pt mask and (b) without the Pt mask. The insets show the respective scanning CCD images of the device. Lorentzian analyses of the measured spectra reveal additional photoluminescence, denoted as Lorentzian 3, in the shorter wavelength region, which originates from the freestanding nanopillar.

Image of FIG. 3.
FIG. 3.

The color maps show the calculated strain variations in a freestanding, rhombus-shaped nanopillar with a height of and an edge width of for (a) in-plane strain tensor and (b) vertical strain tensor . The vertical distributions of and at the center of the nanopillar, , and at the edge, , are also plotted.

Image of FIG. 4.
FIG. 4.

(a) The measured power-dependent spectra of the device without the Pt mask with excitation powers ranging from . Lorentzian analyses of the measured spectra plotted for (b) the peak intensities, (c) the emission wavelengths, and (d) the FWHMs of the PL from the strained and the strain-relaxed regions.

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/content/aip/journal/apl/93/8/10.1063/1.2965461
2008-08-26
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Strain relaxation induced microphotoluminescence characteristics of a single InGaN-based nanopillar fabricated by focused ion beam milling
http://aip.metastore.ingenta.com/content/aip/journal/apl/93/8/10.1063/1.2965461
10.1063/1.2965461
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