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American Physical Society, Physical Review Letters, 20(63), p. 2260-2263, 1989

DOI: 10.1103/physrevlett.63.2260

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Focused Electron Emission from Planar Quantum Point Contacts

Journal article published in 1989 by H. De Raedt, H. Deraedt, H. De Raedt, N. Garca, N. García, Jj J. Sáenz ORCID
This paper is available in a repository.
This paper is available in a repository.

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Abstract

A planar quantum-point-contact device is proposed capable of producing focused electron beams. This solid-state device consists of a tunnel barrier attached to a quantum point contact. By solving the time-independent and time-dependent Schrödinger equation of the 2D system, it is shown that the angular spread of the emitted beam can be reduced to less than 10°, is coherent and collimated in energy, and is able to produce interferences. By applying a magnetic field for which electron orbits have a radius of 2 µm, it should then be possible to focus the beam down to 0.15 µm.