Translator Disclaimer
16 June 2004 Development of trains of ultrashort strain solitons in sapphire and ruby
Author Affiliations +
Ultrashort strain pulses are a promising tool for the analysis and manipulation of condensed matter, thin films, and nanostructures. We present a new and unconventional way to generate coherent longitudinal acoustic wavepackets of high amplitude in the THz frequency range using the nonlinear development of picosecond strain pulses in a crystal. Our work [PRL 89, 285504 (2002)] demonstrated breakup of an initial wavepacket into a train of ultrashort strain solitons, using position-dependent Brillouin scattering. We extend in this paper the interpretation of the Brillouin scattering data in terms of optical Bragg reflections off the moving soliton train, using the analogy with an N-slit diffraction grating. Finally, we show that these short pulses can excite an electronic two-level system at THz resonance frequency, allowing for coherent amplification and even the development of a phonon laser.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Otto L Muskens and Jaap I. Dijkhuis "Development of trains of ultrashort strain solitons in sapphire and ruby", Proc. SPIE 5352, Ultrafast Phenomena in Semiconductors and Nanostructure Materials VIII, (16 June 2004);

Back to Top