Ultrasonic maser amplification by stimulated phonon-photon double quantum emission in MgO

J.A. Armstrong, N.S. Shiren

IEEE JQE

M. Pomerantz, N.S. Shiren

Physics Letters A

K. Kajimura, K. Fossheim, et al.

Physical Review Letters

N.S. Shiren, W. Arnold, et al.

Physical Review Letters