Ultrabroadband, lightweight, flexible, and polarization sensitive photodetector based on carbon nanotube fibers

We present a flexible ultrabroadband (visible to terahertz), polarization-sensitive carbon nanotube fiber photodetector. This photothermoelectric-effect-based room-temperature photodetector fabricated using a unique technique has high responsivities, up to 2.2 mA/W in the terahertz regime.