Hamburg 2009 – scientific programme
Parts | Days | Selection | Search | Downloads | Help
Q: Fachverband Quantenoptik und Photonik
Q 18: Quanteninformation: Photonen I
Q 18.4: Talk
Tuesday, March 3, 2009, 11:15–11:30, VMP 6 HS-D
A High-Temperature Single-Photon Source from Nanowire Quantum Dots — •Thomas Aichele1, Adrien Tribu2, Gregory Sallen2, Catherine Bougerol2, Régis André2, Jean-Philippe Poizat2, Serge Tatarenko2, and Kuntheak Kheng2 — 1Humboldt-Universität zu Berlin, Inst. Physik, Nanooptik, Berlin, Germany — 2Institut Néel, CEA/CNRS/Univ. J. Fourier, Grenoble, France
We present a high-temperature single-photon source based on a quantum dot inside a nanowire. The nanowires were grown by molecular beam epitaxy in the vapor-liquid-solid growth mode. We utilize a two-step growth process that allows a thin, defect-free ZnSe nanowire to grow on top of a broader, cone-shaped nanowire. Quantum dots are formed by incorporating a narrow zone of CdSe into the nanowire. We observe intense and highly polarized photoluminescence even from a single emitter. Efficient photon antibunching is observed up to 220 K, while conserving a normalized antibunching dip of 7 to at most 36%. This is the highest reported temperature for single-photon emission from a nonblinking quantum-dot source and principally allows compact and cheap operation by using Peltier cooling.