Device and method for detecting energy beam

A method for detecting energy beam comprising:

• step S1, providing a device for detecting energy beam comprising:
• a carbon nanotube structure comprising a plurality of carbon nanotubes, wherein an extending direction of each carbon nanotube of the plurality of carbon nanotubes is substantially parallel to each other;
• a support structure supporting the carbon nanotube structure, wherein a portion of the carbon nanotube structure is suspended between the support structure, and the extending direction of each carbon nanotube is substantially perpendicular to the substrate;
• and
• an infrared detector on one side of the suspended portion of the carbon nanotube and spaced apart from the carbon nanotube structure, wherein the infrared detector is configured to detect a temperature of the suspended portion of the carbon nanotube structure, to obtain a temperature distribution of the carbon nanotube structure, and produce an image according to the temperature distribution of the carbon nanotube structure;
• step S2, placing the suspended portion of the carbon nanotube structure on a projectile of an energy beam;
• and
• step S3, producing an image of a temperature distribution of the carbon nanotube structure, thereby obtaining an image or a movement track of beam spots of the energy beam projected on the device.