Figure 4
Schematic of the phonon Bragg switch. G is a reciprocal lattice vector in the crystal; k1 and k2 are wavevectors of femtosecond laser pulses creating phonon superlattice with wavevector q. K and K′ are wavevectors of incident and diffracted X-ray pulses. Reprinted from Bucksbaum & Merlin (1999), Copyright (1999), with permission from Elsevier. |