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arXiv · 1305.4335

Cavity-enhanced real-time monitoring of single charge jumps at the microsecond timescale

Christophe Arnold·Vivien Loo·Aristide Lemaître·Isabelle Sagnes·Olivier Krebs·Paul Voisin·Pascale Senellart·Loïc Lanco
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Abstract

We use fast coherent reflectivity measurements, in a strongly-coupled quantum dot-micropillar device, to monitor in real-time single-charge jumps at the microsecond timescale. Thanks to the strong enhancement of light-matter interaction inside the cavity, the measurement rate is five orders of magnitude faster than with previous experiments of direct single-charge sensing with quantum dots. The monitored transitions, identified at any given time with a less than 0.2% error probability, correspond to a carrier being captured and then released by a single material defect. This high-speed technique opens the way for the real-time monitoring of other rapid single quantum events, such as the quantum jumps of a single spin.

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Christophe Arnold, Vivien Loo, Aristide Lemaître, Isabelle Sagnes, Olivier Krebs, Paul Voisin, Pascale Senellart, Loïc Lanco. 2013-05-19. Cavity-enhanced real-time monitoring of single charge jumps at the microsecond timescale. https://doi.org/10.1103/physrevx.4.021004

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