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Latched Detection of Excited States in an Isolated Double Quantum Dot

A. C. Johnson·C. M. Marcus·M. P. Hanson·A. C. Gossard
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Abstract

Pulsed electrostatic gating combined with capacitive charge sensing is used to perform excited state spectroscopy of an electrically isolated double-quantum-dot system. The tunneling rate of a single charge moving between the two dots is affected by the alignment of quantized energy levels; measured tunneling probabilities thereby reveal spectral features. Two pulse sequences are investigated, one of which, termed latched detection, allows measurement of a single tunneling event without repetition. Both provide excited-state spectroscopy without electrical contact to the double-dot system.

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A. C. Johnson, C. M. Marcus, M. P. Hanson, A. C. Gossard. 2004-01-05. Latched Detection of Excited States in an Isolated Double Quantum Dot. https://doi.org/10.1103/physrevb.71.115333

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