Thermal Profiles Within the Channel of Planar Gunn Diodes Using Micro-Particle Sensors
- Resource Type
- Authors
- David R. S. Cumming; Ata Khalid; C. H. Oxley; Martin Kuball; G M Dunn; James Glover; Miguel Montes Bajo
- Source
- IEEE Electron Device Letters. 38:1325-1327
- Subject
- 010302 applied physics
Physics
business.industry
01 natural sciences
Measure (mathematics)
Temperature measurement
Electronic, Optical and Magnetic Materials
010309 optics
Planar
0103 physical sciences
Thermal
Optoelectronics
Radio frequency
Electrical and Electronic Engineering
Atomic physics
business
Current density
Diode
Communication channel
- Language
- ISSN
- 1558-0563
0741-3106
This letter describes the use of a novel micro-particle sensor ( ${\sim }3{\mu }\text{m}$ diameter) and infra-red microscopy to measure the temperature profile within the active channel (typically 3- ${\mu }\text{m}$ length and 120- ${\mu }\text{m}$ width) of planar Gunn diodes. The method has enabled detailed temperature measurements showing an asymmetrical temperature profile along the active width of these devices. The asymmetrical temperature profile suggests a similar behavior in the channel current density, which may contribute to the lower than expected RF output power.