  Using femtosecond laser machining, we have fabricated photonic bandgap
materials that influence propagation of phonon-polaritons in ferroelectric
crystals. Broadband polaritons were generated with impulsive stimulated Raman
scattering (ISRS) using an ultrashort laser pulse, and the spatial and temporal
evolution of the polaritons were imaged as they propagated through the
fabricated structures with polariton real-space imaging. These techniques offer
a new approach to optical materials design.
