Quantum well

A quantum well is a potential well that confines particles in one dimension, forcing them to occupy a planar region. The effects of quantum confinement take place when the quantum well thickness becomes comparable at the de Broglie wavelength of the carriers (generally electrons and holes), leading to energy levels called "energy subbands", i.e., the carries can only have discrete energy values.

Related Topics:
Potential well - De Broglie wavelength

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By doping the barrier of a quantum well with donor impurities, a two-dimensional electron gas (abbreviated 2DEG) can be formed. This quasi-two dimensional system has interesting properties at low temperature, exhibiting the quantum Hall effect.

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