English
Etymology quantum after the behavior of electrons and photons, cascade for a series of small steps, describing an implementation of a laser.
Alternative spellings quantum cascade laser, a.k.a. QC laser, quantum-cascade laser
Noun quantum cascade laser (plural: quantum cascade lasers)
References http://www.bell-labs.com/org/physicalsciences/projects/qcl/qcl.html http://physicsweb.org/article/world/12/6/9 http://www.wsi.tu-muenchen.de/E26/en/research/qcl/