Publications

Gallium nitride nanotube lasers

Li, Changyi L.; Liu, Sheng L.; Hurtado, Antonio H.; Wright, Jeremy B.; Xu, Huiwen X.; Luk, Ting S.; Figiel, J.J.; Brener, Igal B.; Brueck, S.R.; 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.