Nanobeam Photonic Crystal Cavity Light-Emitting Diodes
  We present results on electrically driven nanobeam photonic crystal cavities formed out of a lateral p-i-n junction in gallium arsenide. Despite their small conducting dimensions, nanobeams have robust electrical properties with high current densities possible at low drive powers. Much like their two-dimensional counterparts, the nanobeam cavities exhibit bright electroluminescence at room temperature from embedded 1,250 nm InAs quantum dots. A small room temperature differential gain is observed in the cavities with minor beam self-heating suggesting that lasing is possible. These results open the door for efficient electrical control of active nanobeam cavities for diverse nanophotonic applications. 
Gary Shambat, Bryan Ellis, Jan Petykiewicz, Marie A. Mayer, Tomas   Sarmiento, James Harris, Eugene E. Haller, and Jelena Vu...
physics.optics