Light Emission by Nanoporous GaN Produced by a Top-Down, Nonlithographical Nanopatterning

Figure 1

(a) Top view HRSEM image of np-GaN prepared by SOSA of GaN (bar is 200 nm). The red lines represent nonpreferred light polarizations discussed in the text. (b) 3D/tilted-view HRSEM image. (c) Fast Fourier Transform of SEM image shown in (a) and (d) pore cross-sectional plot. The average pore diameter is ~60 nm, wall thickness is ~33 nm, and surface porosity is ~42%.

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