Electrons in recent
devices are confined to planes (Quantum Wells), lines (Quantum Wires)
or mathematical points (Quantum Dots). The sizes of these devices vary
from a few microns to a few nanometers. When an electric field is applied
perpendicular to the surface of a quantum device (or, equivalently,
a voltage is applied between one side of the quantum well and the other),
the optical absorption of the quantum device can be changed. The important
point about quantum materials is that this change in absorption is relatively
large. A change in optical absorption with applied electric field or
voltage is called "Electro Absorption" . The applications of
these devices cover all the areas from medicine to aerospace.
Recently, there has been serious interest in the possibility of fabricating and applying nanoscale quantum computers. In a quantum computer, it is proposed that massively parallel computations can be performed through the "natural" mechanism of interference among the quantum waves associated with the coherent quantum states. Proposed quantum computers would represent each bit of information as a quantum state, for example as the spin orientation of an atom.
Please select one of the Applets below for Quantum-Electronics:
| Numerov Quantum Well Calculator|
| III-Nitrides Bandgap Calculator|