Latched Detection of Excited States in an Isolated Double Quantum Dot

Details Latched Detection of Excited States in an Isolated Double Quantum Dot Latched Detection of Excited States in an Isolated Double Quantum Dot

2003-12-31

arxiv.org/abs/cond-mat/0312717v2

Phys. Rev. B 71, 115333 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

related papers available at http://marcuslab.harvard.edu

Scientific paper

10.1103/PhysRevB.71.115333

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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