Ultrafast electric pulse generation and detection device and use method thereof

An ultrafast electric pulse generation and detection device, comprising:

• a laser for generating femtosecond excitation light;
• an electric pulse generator, comprising:
• a photoelectric material layer comprising an optically controlled switching region for responding to the femtosecond excitation light generated by the laser;
• an insulating layer formed on the photoelectric material layer, wherein a switch structure exists at a position of the insulating layer corresponding to the optically controlled switching region, and exposes the optically controlled switching region partially or completely;
• transmission lines formed on the insulating layer, the transmission lines comprise a current transmission line and at least one ground signal transmission line;
• wherein the current transmission line comprises a first section of current transmission line and a second section of current transmission line, the switch structure is located between the first section of current transmission line and the second section of current transmission line, and opposite ends of the first section of current transmission line and the second section of current transmission line are respectively aligned with opposite edges of the switch structure;
• a voltage source connected to the first section of current transmission line, and used to output a bias voltage.