Figure 3
From: Pulsed Near-IR Photoresponse in a Bi-metal Contacted Graphene Photodetector
Temperature dependent photoresponse of the photodetector and a thermocouple.
(a) Photovoltage as a function of the gate voltage to one pulsed near-IR laser excitation at different temperatures. Upper inset: Device’s optical micrograph replotted from the inset of Fig. 1a. Bottom inset: Photovoltage as a function of the temperature at different gate voltages. (b) Photoresponse of a Cr—Au thermocouple to a CW near-IR excitation as a function of the temperature. Data is shown for the beam focused on the gold pad (blue line), the chromium pad (red line) and the junction (black line). Inset: Optical micrograph of the thermocouple. Colored circles show the beam positions for curves in (b), correspondingly.
