The generation of cw Terahertz radiation from photomixing in low-temperature grown GaAs is limited by the thermal load for single emitters. We propose a new heat sinking scheme based on high thermal conductivity, transparent crystalline heat spreaders as diamond in direct contact with the active zone. A first working device based on recessed electrodes is demonstrated and has a significant power dissipation capability of more than 0.75 W (average). The electrical and terahertz characteristics are analyzed.
Diamond heat sinking of terahertz antennas for continuous-wave photomixing
Present address: Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
T. Ackemann, M. Alduraibi, S. Campbell, S. Keatings, P. Luke Sam, H. Fraser, A. S. Arnold, E. Riis, M. Missous; Diamond heat sinking of terahertz antennas for continuous-wave photomixing. J. Appl. Phys. 15 December 2012; 112 (12): 123109. https://doi.org/10.1063/1.4770460
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