Carrier Transit Time Reduction for Broadband Photoconductive Terahertz Detection at Telecommunication Wavelengths

We present a broadband telecommunication-compatible photoconductive terahertz detector, which combines both plasmonic enhancement and carrier confinement to achieve ultrafast carrier transport without utilizing short-carrier-lifetime photoconductors. We demonstrate terahertz detection with more than a 125 dB signal-to-noise ratio (SNR) over a 3.6 THz bandwidth.