Article | REF: E6470 V1

Quantum cascade lasers

Authors: Angela VASANELLI, Carlo SIRTORI

Publication date: August 10, 2019

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6. Glossary

semiconductor quantum well; puits quantique de semi-conducteur

Artificial material consisting of a semiconductor with a low bandgap energy, sandwiched between two semiconductor layers with the same lattice parameter and a higher bandgap energy.

intersubband transition; transition intersousbande

Transition between electronic states confined in a quantum well.

miniband (minigap); miniband (minigap)

Set of allowed (forbidden) electronic states in a set of tunnel-coupled quantum wells. Minibands and minigaps are used in the active region to define the regions in which electronic transport can take place.

cascade effect; cascade mechanism

Mechanism at the heart of quantum cascade laser operation: during laser operation,...

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