Publications

We have observed an unexpected temperature dependence in the intensity of Raman scattering resonant with the ground state exciton in GaAs-AlGaAs quantum well heterostructures.

We observe resonant Rayleigh scattering of light from quantum Hall bilayers at Landau level filling factor nu=1.

We demonstrate an efficient intracavity nonlinear interaction of laser modes in a specially adapted quantum cascade (QC) laser.

We demonstrate an efficient intracavity nonlinear interaction of laser modes in a specially adapted quantum cascade (QC) laser.

The energy distribution of hot electrons quasiballistically in p+ GaAs has been directly probed using the tunneling resonances of a double barrier in a specially designed two terminal heterojunctio

We have studied the perpendicular transport in the double- barrier structures of the InGaAs-InP system, with particular focus on reducing the large leakage current caused by conduction at the perim

We observe resonant tunneling into a voltage biased fractional quantum Hall effect (FQHE) edge, using atomically sharp tunnel barriers unique to cleaved-edge overgrown devices.

We have employed a new electron spectroscopy technique based on resonant tunneling to study hot minority electron transport in GaAs quantum wells, following ballistic injection.

New results on the physics of tunneling in quantum well heterostructures and its device applications are discussed.

We have measured the resonant cross section sigma (n), for nuclear excitation of In-115 via the radiationless annihilation of a positron with a K-shell electron using a monoenergetic positron beam