The earliest (known to me) proposal is by Yura and Hanamura[1]. People however remember better the works by A. Ĭmamoḡlu,[2][3] although he also quickly (like Yura) abandoned the topic for other problems.
it became more obvious to us
that a “cavity-polariton laser” (if the concept had any meaning) could not be an ordinary laser.
The polariton laser is approaching from the light point of view the problem of coherence that atoms approach from the matter point of view with the concept of the atom laser.[4][5]