Niobium diselenide superconducting photodetectors

Abstract

We report the photoresponse of niobium diselenide (NbSe${}_2$), a transition metal dichalcogenide (TMD) which exhibits superconducting properties down to a single layer. Devices are built by using micro-mechanically cleaved 2 to 10 layers and tested under current bias using nano-optical mapping in the 350mK-5K range, where they are found to be superconducting. The superconducting state can be broken by absorption of light, resulting in a voltage signal when the devices are current biased. The response found to be energy dependent making the devices useful for applications requiring energy resolution, such as bolometry, spectroscopy and infrared imaging.

6 pages, 6 figures

References in corpus (4)

• Two Dimensional Atomic Crystals
• Superconducting nanowire single-photon detectors: physics and applications
• Rayleigh Imaging of Graphene and Graphene Layers
• Visibility of dichalcogenide nanolayers

Cited by in corpus (5)

• Fundamental limits of few-layer NbSe${}_2$ microbolometers at terahertz frequencies
• Local photodoping in monolayer MoS2
• Toward single-photon detection with superconducting niobium diselenide nanowires
• On-chip visible light communication-band metasurface modulators with niobium plasmonic nano-antenna arrays
• Photothermal responsivity of van der Waals material-based nanomechanical resonators