Numerical Study on Radio-frequency Field Emission from Carbon Nanotube Film in a Photonic Crystal Diode Resonator

Numerical Study on Radio-frequency Field Emission from Carbon Nanotube Film in a Photonic Crystal Diode Resonator

This paper describes a novel electron gun generating a high-frequency modulated electron beam from a carbon nanotube (CNT) film placed in the defect area of a two-dimensional photonic crystal (PC) diode resonator. The PC diode resonator consists of periodic dielectric rods around the defect and two plane electrodes (anode and cathode), which is capable of simultaneously supplying both <i>dc</i>-bias voltage and resonant <i>rf</i> voltage across the cathode-anode gap. Numerical investigation using a three-dimensional particle-in-cell code demonstrates that such a device is compatible with high frequency and could lead to applications in compact, light, and efficient microwave vacuum electronics operating at frequencies up to terahertz.

This paper describes a novel electron gun generating a high-frequency modulated electron beam from a carbon nanotube (CNT) film placed in the defect area of a two-dimensional photonic crystal (PC) diode resonator. The PC diode resonator consists of periodic dielectric rods around the defect and two plane electrodes (anode and cathode), which is capable of simultaneously supplying both <i>dc</i>-bias voltage and resonant <i>rf</i> voltage across the cathode-anode gap. Numerical investigation using a three-dimensional particle-in-cell code demonstrates that such a device is compatible with high frequency and could lead to applications in compact, light, and efficient microwave vacuum electronics operating at frequencies up to terahertz.