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Diamond heat sinking of terahertz antennas for continuous-wave photomixing

Ackemann, T. and Alduraibi, M. and Campbell, S. and Keatings, S. and Sam, P. Luke and Fraser, H. and Arnold, A. S. and Riis, E. and Missous, M. (2012) Diamond heat sinking of terahertz antennas for continuous-wave photomixing. Journal of Applied Physics, 112 (12). ISSN 0021-8979

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    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 0.75W (average). The electrical and terahertz characteristics are analyzed.