Superlattice ultrasonic wave generator
US4469977A · kind A · utility
12Cited by
11References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1982 |
| Grant date | Sep 4, 1984 |
| Priority date | — |
| Expiry date | Oct 19, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/825
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An ultrasonic wave generator comprising a semiconductor superlattice with a periodic variation in its space charge and a far infrared laser for applying a transient electric field to the superlattice transverse to the direction of its periodic variation. The ultrasonic wave produced has a wavelength of the period of the superlattice which can result in 100 gigahertz ultrasonic waves. Structure is included for guiding these waves into an acoustic system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.