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. 2021 May 12;12:2728. doi: 10.1038/s41467-021-22943-1

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© The Author(s) 2021, corrected publication 2021

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Fig. 2 — a Experimental setup: a CW laser is modulated via a MZM. It is then amplified with an EDFA and focused on the GFET. An AC signal is applied to the gate. The output f_IF is measured on a VNA. Inset: optical image of device with laser focused on the channel. b Blue curve: source-drain current versus gate voltage, for V_DS = 200 mV. Orange curve: photocurrent versus gate voltage, generated by a 25 mW beam focused on the SLG channel.