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\bibitem{Betz_etal2001} Betz, A. L., Boreiko, R. T., Sivananthan, S., \& Ashokan, R. (2001). HgCdTe photoconductive mixers for 2-8 THz. In C. Iit.u.t.e of T. Jet Propulsion Laboratory (Ed.), \textit{Proc. 12$^{th}$ Int. Symp. Space Terahertz Technol.} (pp. 92--101). San Diego, CA, USA.

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