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Transverse modes supported by the nanowire-metal geometry. The black circle and straight line indicate the surfaces of the nanowire and metal substrate, respectively.
Schematic showing the Si3N4 film selectively patterned with gold spots for optical characterization of the GaN nanowires. The inset shows a SEM image of gold spots.
SEM images of the same GaN nanowire (a) on top of the Si3N4 film; and (b) after being transferred onto a gold-coated region. The scale bars represent 3 μm.
Spectra of a GaN nanowire lasing (a) on Si3N4 and (b) after being transferred onto gold.
Propagation loss for the different modes supported by a 300 nm diameter nanowire (operation wavelength: 370 nm).
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