Diamond heat sinking of terahertz antennas for continuous-wave photomixing

Ackemann, T.; Alduraibi, M.; Campbell, S.; Keatings, S.; Luke Sam, P.; Fraser, H.; Arnold, A. S.; Riis, E. and Missous, M. (2012). Diamond heat sinking of terahertz antennas for continuous-wave photomixing. Journal of Applied Physics, 112(12), article no. 123109.

DOI: https://doi.org/10.1063/1.4770460

Abstract

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.

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