Maarten H. M. van Weert, Nika Akopian, Umberto Perinetti, Maarten P.
van Kouwen, Rienk E. Algra, Marcel A. Verheijen, Erik P. A. M. Bakkers,
Leo P. Kouwenhoven and Val Zwiller
Selective
Excitation and Detection of Spin States in a Single Nanowire Quantum Dot
Abstract:
We report exciton spin memory in a single InAs0.25P0.75 quantum dot
embedded in an InP nanowire. By synthesizing clean quantum dots with
linewidths as narrow as about 30 μeV, we are able to resolve individual
spin states at magnetic fields on the order of 1 T. We can prepare a
given spin state by tuning excitation polarization or excitation
energy. These experiments demonstrate the potential of this system to
form a quantum interface between photons and electrons.