
1) Quantum mechanic 2) Semiconductor structure
Found on
https://www.crosswordclues.com/clue/quantum-well

A quantum well is a potential well with only discrete energy values. One technology to create is to confine particles, which were originally free to move in three , to two dimensions, forcing them to occupy a planar region. The effects of quantum confinement take place when the quantum well thickness becomes comparable to the de Broglie wavelength...
Found on
http://en.wikipedia.org/wiki/Quantum_well

(from the article `nanotechnology`) VCSELs have nanoscale layers of compound semiconductors epitaxially grown into their structurealternating dielectric layers as mirrors and quantum ... One commercially available device for photonic switching is the quantum-well self-electro-optic-effect device, or SEED. The key concept for this ...
Found on
http://www.britannica.com/eb/a-z/q/4

A P-N-P junction in which the 'N' layer is ~10nm (where traditional physics leaves off and quantum effects take over) and an 'electron trap' is created.
Found on
http://www.encyclo.co.uk/local/20741
No exact match found.