Another approach to simultaneously enhance the speed and responsivity of photodetectors is the coupling to localized surface plasmon resonances (LSPR). A localized surface plasmon is the collective oscillation of the free electron gas within a metallic nanostructure, which decays on the timescale of picoseconds after excitation. The radiative component of this decay plays a key role in the near-field enhancement of the electric field, while the non-radiative component generates hot electrons (Figure ). The resonances, decay components and -times can be tuned by the chemical nature and morphology of the nanostructure, e.g. with sharp structures like stars. A fast collection of the hot electrons provided, plasmonic/TMDC detectors exhibit bandwidths in the GHz regime. The simultaneous near-field enhancement of plasmonic structures is advantageous for the responsivity, and an 1000-fold increases in photocurrent as well as the extension of the spectral range has been demonstrated for a Pt-plasmonic/MoS2 photodetector. The combination of ultrafast hot electrons, high near field enhancements, potential use of plasmonic lattices and the extended detection range hold great promise to reach tens of GHz bandwidths with good responsivities in TMDCs. 50