2003/12/09 by J. M. Elzerman, R. Hanson, L. H. Willems van Beveren +2
Physics and Astronomy · #cond-mat.mes-hall
paper · pdf · doi:10.1063/1.1757023
published as Applied Physics Letters 84, 4617-4619 (2004) · 4 pages, 4 figures
arxiv created 2003/12/09 · arxiv updated 2009/12/01
We demonstrate a novel method for measuring the discrete energy spectrum of a quantum dot connected very weakly to a single lead. A train of voltage pulses applied to a metal gate induces tunneling of electrons between the quantum dot and a reservoir. The effective tunnel rate depends on the number and nature of the energy levels in the dot made accessible by the pulse. Measurement of the charge dynamics thus reveals the energy spectrum of the dot, as demonstrated for a dot in the few-electron regime.