Tuning a resonance in the Fock space: Optimization of phonon emission in a resonant tunneling device

L. E. F. FOA TORRES; H. M. PASTAWSKI; S. S. MAKLER

PHYSICAL REVIEW B - CONDENSED MATTER AND MATERIALS PHYSICS

The American Physical Society

Año: 2001 vol. 64 p. 193304 - 193304

0163-1829

Tuning a resonance in the Fock space: Optimization of phonon emission in a resonanttunneling device L.E.F. Foa Torres, H.M. Pastawski and S.S. Makler Phys. Rev. B.  64, 193304 (2001)Abstract:Phonon-assisted tunneling in a double-barrier resonant-tunneling device can be seen as a resonance in the electron-phonon Fock space that is tuned by the applied voltage. We show that the geometrical parameters can induce a symmetry condition in this space that can strongly enhance the emission of longitudinal optical phonons. For devices with thin-emitter barriers this is achieved by a wider collector barrier.DOI: 10.1103/PhysRevB.64.193304 PACS number~s!: 73.40.Gk, 71.38.2k, 73.50.Bk, 73.50.Fq