Complete Coherent Control of a Quantum Dot Strongly Coupled to a Nanocavity.
Strongly coupled quantum dot-cavity systems provide a non-linear configuration of hybridized light-matter states with promising quantum-optical applications. Here, we investigate the coherent interaction between strong laser pulses and quantum dot-cavity polaritons. Resonant excitation of polaritonic states and their interaction with phonons allow us to observe coherent Rabi oscillations and Ramsey fringes. Furthermore, we demonstrate complete coherent control of a quantum dot-photonic crystal cavity based quantum-bit. By controlling the excitation power and phase in a two-pulse excitation scheme we achieve access to the full Bloch sphere. Quantum-optical simulations are in good agreement with our experiments and provide insight into the decoherence mechanisms.
E. L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA.
Constantin
C
Dory
E. L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA.
Kevin A
KA
Fischer
E. L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA.
Kai
K
Müller
E. L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA.
Konstantinos G
KG
Lagoudakis
E. L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA.
Tomas
T
Sarmiento
E. L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA.
Armand
A
Rundquist
E. L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA.
Jingyuan L
JL
Zhang
E. L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA.
Yousif
Y
Kelaita
E. L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA.
Jelena
J
Vučković