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arXiv · 1512.05952

Complete Coherent Control of a Quantum Dot Strongly Coupled to a Nanocavity

Constantin Dory·Kevin A. Fischer·Kai Müller·Konstantinos G. Lagoudakis·Tomas Sarmiento·Armand Rundquist·Jingyuan L. Zhang·Yousif Kelaita·Jelena Vuckovic
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Abstract

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.

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Constantin Dory, Kevin A. Fischer, Kai Müller, Konstantinos G. Lagoudakis, Tomas Sarmiento, Armand Rundquist, Jingyuan L. Zhang, Yousif Kelaita, Jelena Vuckovic. 2016-04-11. Complete Coherent Control of a Quantum Dot Strongly Coupled to a Nanocavity. https://doi.org/10.1038/srep25172

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