Publications Details

Gallium nitride nanotube lasers

Li, Changyi; Liu, Sheng; Hurtado, Antonio; Wright, Jeremy B.; Xu, Huiwen; Luk, Ting S.; Figiel, Jeffrey J.; Brener, Igal; Brueck, Steven R.J.; Wang, George T.

Lasing is demonstrated from gallium nitride nanotubes fabricated using a two-step top-down technique. By optically pumping, we observed characteristics of lasing: a clear threshold, a narrow spectral, and guided emission from the nanotubes. In addition, annular lasing emission from the GaN nanotube is also observed, indicating that cross-sectional shape control can be employed to manipulate the properties of nanolasers. The nanotube lasers could be of interest for optical nanofluidic applications or application benefitting from a hollow beam shape.