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Scanning electron microscope picture of the resonant LT-GaAs photoconductor.
(Color online) Experimental set-up used for the photomixing experiment: λ/2, half-wave plate; P, polarizer; SOA, semiconductor optical amplifier.
(Color online) Bias voltage dependence of the dc photocurrent Idc for an optical power Popt = 107 mW. Inset: Idc as function of the optical power for a bias voltage VB = 3.5 V.
(Color online) Output power versus photocurrent for beatnotes frequencies fB = 50 and 305 GHz. The optical power (Popt = 107 mW) is kept constant while the bias voltage is varied. Inset: output power versus photocurrent for fB = 305 GHz. The bias voltage (VB = 3.5 V) is kept constant while Popt is varied.
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