Lasing in planar semiconductor diodes
  We present a planar laser diode based on a simple fabrication scheme compatible with virtually any geometry accessible by standard semiconductor lithography technique. We show that our lasers exhibit ~1 GHz -3dB-modulation-bandwidth already in this prototypical implementation. Directions for a significant speed increase are discussed. 
Giorgio De Simoni, Lukas Mahler, Vincenzo Piazza, Alessandro   Tredicucci, Christine A. Nicoll, Harvey E. Beere, David A. Ri...
cond-mat.mes-hall