Print Email Facebook Twitter Spontaneous emission control of single quantum dots in bottom-up nanowire waveguides Title Spontaneous emission control of single quantum dots in bottom-up nanowire waveguides Author Bulgarini, G. Reimer, M.E. Zehender, T. Hocevar, M. Bakkers, E.P.A.M. Kouwenhoven, L.P. Zwiller, V. Faculty Applied Sciences Department QN/Quantum Nanoscience Date 2012-03-20 Abstract Nanowire waveguides with controlled shape are promising for engineering the collection efficiency of quantum light sources. We investigate the exciton lifetime in individual InAsP quantum dots, perfectly positioned on-axis of InP nanowire waveguides. We demonstrate control over the quantum dot spontaneous emission by varying the nanowire diameter in e-beam patterned arrays, which modifies the coupling efficiency of the emitter to the fundamental waveguide mode. The spontaneous emission rate is inhibited by a factor of 12 in thin nanowires compared to nanowires with optimized waveguide diameter. From the measured inhibition factor, we determine a high radiative yield exceeding 92% in bottom-up grown nanowires. Subject arsenic compoundsexcitonsIII-V semiconductorsindium compoundsnanowiresoptical waveguidesphotoluminescencesemiconductor quantum dotsspontaneous emission To reference this document use: http://resolver.tudelft.nl/uuid:daf9102b-d8aa-4872-8897-a3429de0a032 DOI https://doi.org/10.1063/1.3694935 Publisher American Institute of Physics ISSN 0003-6951 Source http://apl.aip.org/resource/1/applab/v100/i12/p121106_s1 Source Applied Physics Letters, 100 (12), 2012 Part of collection Institutional Repository Document type journal article Rights © 2012 The Author(s)American Institute of Physics Files PDF Bulgarini_2012.pdf 1.76 MB Close viewer /islandora/object/uuid:daf9102b-d8aa-4872-8897-a3429de0a032/datastream/OBJ/view