论文信息 - Optical generation of tunable ultrasonic waves

Optical generation of tunable ultrasonic waves

A convenient method of optically exciting and monitoring coherent acoustic waves in transparent or light‐absorbing liquids and solids is described. The acoustic frequency is easily and continuously tunable from ≊3 MHz to at least 30 GHz with our experimental apparatus and in principle over a considerably wider range. In anisotropic materials any propagation direction can be selected. The optically generated acoustic waves can be optically amplified, cancelled, or phase shifted.

[1] K. Nelson,et al. Excited state dynamics in pure molecular crystals: perylene and the excimer problem , 1979 .

[2] H. Eichler,et al. Time and frequency behavior of sound waves thermally induced by modulated laser pulses , 1973 .

[3] Keith A. Nelson,et al. Laser induced phonons: A probe of intermolecular interactions in molecular solids , 1980 .

[4] G. Cachier. Laser Excitation of Microwave Sound in Solids , 1971 .

[5] K. Nelson,et al. Laser-induced phonon spectroscopy. Optical generation of ultrasonic waves and investigation of electronic excited-state interactions in solids , 1981 .

[6] H. Eichler,et al. Thermal diffusion measurements using spatially periodic temperature distributions induced by laser light , 1973 .