Nondestructive optical measurements of a single electron spin in a quantum dot.
Kerr rotation measurements on a single electron spin confined in a charge-tunable semiconductor quantum dot demonstrate a means to directly probe the spin off-resonance, thus minimally disturbing the system. Energy-resolved magneto-optical spectra reveal information about the optically oriented spin polarization and the transverse spin lifetime of the electron as a function of the charging of the dot. These results represent progress toward the manipulation and coupling of single spins and photons for quantum information processing.
Berezovsky
J
J
Center for Spintronics and Quantum Computation, University of California, Santa Barbara, CA 93106, USA.
Mikkelsen
M H
MH
Gywat
O
O
Stoltz
N G
NG
Coldren
L A
LA
Awschalom
D D
DD