Ultrasonics in the Tetrahertz Frequency Range-Theories.- Optical
Transducers.- Theories and Experiments.- Quantum Theory of Terahertz
Frequency Range.- Application to Nanoacoustical Imaging with Nanometer
Image Resolution.- SASER-Theories and Principles based on Tetrahertz
Ultrasound.- Transducers for SASER.- Applications of SASER.- Quantum
Acoustical Imaging based on Quantum Mechanical Properties-Phonon
Entanglement.- Quantum Acoustical Microscope based on
Entanglement-Enhancement of Image Resolution.- Conclusions.