The paper describes the use of a novel microparticle sensor (~3 μm diameter) and infra-red (IR) microscopy to measure the temperature profile within the active channel (typically 3 μm length and 120 μm 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 behaviour in the channel current density, which may contribute to the lower than expected RF output power.
- infrared measurements
- temperature measurement
- Gunn devices
- planar objects
Glover, J., Khalid, A., Cumming, D., Dunn, G. M., Kuball, M., Bajo, M. M., & Oxley, C. H. (2017). Thermal Profiles Within the Channel of Planar Gunn Diodes Using Micro-Particle Sensors. IEEE Electron Device Letters, 38(9), 1325-1327. https://doi.org/10.1109/LED.2017.2731961