Ballistic electron spectroscopy.

The authors demonstrate the feasibility of ballistic electron spectroscopy as a tool for mesoscopic physics. A quantum dot is utilized as an energy-selective detector of nonequilibrium ballistic electrons injected into a two-dimensional electron system. In this letter they use a second quantum dot as the electron injector to evaluate the scheme. They propose an application in the study of interacting one- and zero-dimensional systems. [ABSTRACT FROM AUTHOR]