Spectral response of carbon nanotube-based device

Being direct band-gap materials, carbon nanotubes have a potential to be efficient spectrum detection material. By depositing the carbon nanotubes on the substrate surface using chemical vapor deposition growth methods, a carbon nanotube-based device is fabricated with micromachined techniques. The structure of the carbon nanotube- based device is characterized using scanning electron microscope image. The spectra of carbon nanotube-based device are measured. The photocurrent as a function of wavelength reveals a broad absorption at wavelength from 500 to 1000 nm, showing the potential application in wide-range spectrum detection.