PbSnTe double-heterostructure lasers and PbEuTe double-heterostructure lasers by hot-wall epitaxy
Pb/sub 1-//sub x/ Sn/sub x/ Te, double-heterostructure (DH) lasers and Pb/sub 1-//sub x/ Eu/sub x/ Te DH lasers produced by hot-wall epitaxy have been studied. The growth temperature for both laser crystals is 300 /sup 0/C. This is lower than the growth temperatures obtainable by molecular-beam epitaxy and liquid phase epitaxy. By investigating the I-V characteristics of Pb/sub 1-//sub x/ Sn/sub x/ Te DH lasers with x values greater than 0.2, it was confirmed that the band structure of the p-n heterojunction is type 1'. A Pb/sub 1-//sub x/ Sn/sub x/ Te/sub 1-//sub y/ Se/sub y/ layer, rather than a PbTe/sub 1-//sub y/ Se/sub y/ layer, should be used for the cladding layer of Pb/sub 1-//sub x/ Sn/sub x/ Te DH lasers with x values greater than 0.2. One of the primary factors preventing an increase in the maximum operating temperature to 200 K is that the carrier density injected into the active layer is not sufficient for laser emissions over 200 K due to the p-n heterojunction of the type 1' band structure. The band structure of the p-n heterojunction of Pb/sub 1-//sub x/ Eu/sub x/ Te DH lasers is type 1. Therefore, the maximum operating temperatures of the Pb/sub 1-//sub x/ Eu/sub x/ Te DH lasers are expected to be greater than those of Pb/sub 1-//sub x/ Sn/sub x/ Te DH lasers. The maximum operating temperature of Pb/sub 1-//sub x/ Eu/sub x/ Te DH lasers exceeded 200 K. The maximum operating temperature of the laser with a PbTe active layer was 170 K under CW operation and 243 K under pulsed operation.
- Research Organization:
- Fujitsu Laboratories Ltd., 10-1 Morinosato-Wakamiya, Atsugi 243-01, Japan
- OSTI ID:
- 6594607
- Journal Information:
- J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 65:3; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420300* -- Engineering-- Lasers-- (-1989)
CHALCOGENIDES
ELECTRONIC STRUCTURE
EPITAXY
FABRICATION
HETEROJUNCTIONS
INTERFACES
JUNCTIONS
LASERS
LEAD COMPOUNDS
LEAD SELENIDES
LEAD TELLURIDES
LOW TEMPERATURE
MEDIUM TEMPERATURE
OPERATION
P-N JUNCTIONS
SELENIDES
SELENIUM COMPOUNDS
SEMICONDUCTOR DEVICES
SEMICONDUCTOR JUNCTIONS
SEMICONDUCTOR LASERS
TELLURIDES
TELLURIUM COMPOUNDS
TIN COMPOUNDS
TIN SELENIDES
TIN TELLURIDES
VAPOR PHASE EPITAXY