THRESHOLD CALCULATIONS FOR SUPERCONDUCTING AND OTHER INFRARED LASERS,
Abstract
Stimulated radiative emission at the gap frequency in superconductors due to quasi-particle pairing is found to be more likely than stimulated phonon emission. Threshold conditions for lasing in normal-to-superconducting metal junctions were calculated. Criteria are established for determining the magnitude of current density in a superconductor which will destroy the energy gap. The range of several parameters for which radiation may be expected in injection type lasers is presented. A temperature dependent calculation of these lasing conditions for tantalum is also given. Experimental confirmation of the existence of stimulated emission in Al-Ta point contacts is presented. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 03, 1969
- Accession Number
- AD0685795
Entities
People
- J. Bostock
- L. Leopold
- W. D. Gregory
Organizations
- Georgetown University