Guided space-time wavepacket generation through stimulated Brillouin scattering in waveguide system

We propose a novel all-optical method to generate space-time wavepackets in a multimode slab waveguide using multilevel inter-band stimulated Brillouin scattering. Two pumps along with a signal source are incident into the slab waveguide. The pumps excite an acoustic mode via electrostriction. The phonons then interact with the signal mode causing an indirect inter-band photonic transition. The process results in a space-time wavepacket that is propagate-invariant in the waveguide.