Controlling the Threshold and Direction of Stimulated Brillouin Scattering in Piezoelectric Semiconductors

When an electrostatic field induces net acoustic gain in a piezoelectric semiconductor, the threshold for stimulated Brillouin scattering decreases exponentially with acoustic gain. The threshold can be lowest for acoustic waves in the field direction, resulting in control over the direction of stimulated Brillouin scattering. Copyright © 1969, by The Institute of Electrical and Electronics Engineers, Inc.