I want to add the voltage to both ends of the metal(AU),but I can’t find the answer in FDTD website. If I can add the voltage,how can I do ? If I can’t add the voltage,maybe you have another way can tell me,and show detail.
One small note to add to @msaygin comment is if you are interested to study the optical behavior under applied voltage, please note that FDTD simulations are not meant to capture these modifications. Here is a similar question that might be useful for you to read: