Sound Wave Interactions in InSb.
Interim technical rept.,
STANFORD UNIV CA MICROWAVE LAB
Pagination or Media Count:
The study concerns the interaction between microwave acoustic waves and drifting electrons in high mobility n-InSb at 77K in a transverse magnetic field. The first detailed measurements of acoustic amplification in the range 0.5-2.0 GHz for shear waves propagating in the 110 direction are presented. Using bulk LiNbO3 transducers, acoustic gain as a function of electron drift velocity was determined for the range of magnetic fields 0-9 kG. While the transverse magnetic field reduced the effective RF mobility, thus lowering the drift velocity for maximum acoustic gain, the DC mobility was unaffected due to the presence of the Hall field. Maximum acoustic gain occurred for drift fields of only a few voltscm, and the DC power dissipation was sufficiently low to allow CW operation of the device. Author
- Solid State Physics