Figure 6.

Artifact amplitude of Au electrode. (A) The typical recording artifact of one Au electrode for different light power intensities under 20 ms pulse duration. (B) The amplitude of negative and positive peaks of the artifact measured for different light power intensities. The result shows the negative peak amplitude is increasing linearly with respect to the light pulse intensity. The positive peak amplitude increases at first and then goes to saturation with enhancing light intensity. (C) The typical recording artifact of one Au electrode for different duration under 54.1 mW/mm². (D) The amplitude of negative and positive peaks of the artifact measured for different durations. The result shows the negative peak amplitude almost remains constant with respect to the light duration. However, the positive peak artifacts increase as duration gets longer and saturate for large light durations.