Ballistic Electron Emission Microscopy (BEEM) and Spectroscopy of Buried Semiconductor Heterostructures and Quantum Dots(STM-BEEM interfaces)

BEEM is a powerful, new low energy electron microscopy for imaging and spectroscopy of buried quantum objects and nondestructive local characterization of buried semiconductor heterostructures. We will present several applications : 1) Imaging and spectroscopy of 300Å InAs islands confined by GaAs potential barriers 2) Local conduction band offsets of GaSb self assembled quantum dots in GaAs 3) Spatial probing of the order-disorder transition in GaInP/GaAs heterostructures 4) Imaging of misfit dislocations at the InGaAs/GaAs interface buried 600Å below the surface 5) Conduction band structure of Ga