Fast Electrical Control of a Quantum Dot Strongly Coupled to a Nano-resonator

Details Fast Electrical Control of a Quantum Dot Strongly Coupled to a Nano-resonator Fast Electrical Control of a Quantum Dot Strongly Coupled to a Nano-resonator

2009-06-03

arxiv.org/abs/0906.0751v1

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevLett.104.047402

The resonance frequency of an InAs quantum dot strongly coupled to a GaAs photonic crystal cavity was electrically controlled via quantum confined Stark effect. Stark shifts up to 0.3meV were achieved using a lateral Schottky electrode that created a local depletion region at the location of the quantum dot. We report switching of a probe laser coherently coupled to the cavity up to speeds as high as 150MHz, limited by the RC constant of the transmission line. The coupling rate and the magnitude of the Stark shift with electric field were investigated while coherently probing the system.

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