Light-hole Exciton in Nanowire Quantum Dot
  Quantum dots inserted inside semiconductor nanowires are extremely promising candidates as building blocks for solid-state based quantum computation and communication. They provide very high crystalline and optical properties and offer a convenient geometry for electrical contacting. Having a complete determination and full control of their emission properties is one of the key goals of nanoscience researchers. Here we use strain as a tool to create in a single magnetic nanowire quantum dot a light-hole exciton, an optically active quasiparticle formed from a single electron bound to a single light hole. In this frame, we provide a general description of the mixing within the hole quadruplet induced by strain or confinement. A multi-instrumental combination of cathodoluminescence, polarisation-resolved Fourier imaging and magneto-optical spectroscopy, allow us to fully characterize the hole ground state, including its valence band mixing with heavy hole states. 
Mathieu Jeannin (1 and 2), Alberto Artioli (1 and 2), Pamela   Rueda-Fonseca (1 and 2 and 3), Edith Bellet-Amalric (1 and 3)...
cond-mat.mes-hall cond-mat.other physics.optics