Chip-Scalable, Room-Temperature, Zero-Bias, Graphene-Based Terahertz Detectors with Nanosecond Response Time.
De Fazio, Domenico
Shinde, Sachin M
Ferrari, Andrea C
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Asgari, M., Riccardi, E., Balci, O., De Fazio, D., Shinde, S. M., Zhang, J., Mignuzzi, S., et al. (2021). Chip-Scalable, Room-Temperature, Zero-Bias, Graphene-Based Terahertz Detectors with Nanosecond Response Time.. ACS nano https://doi.org/10.1021/acsnano.1c06432
The scalable synthesis and transfer of large-area graphene underpins the development of nanoscale photonic devices ideal for new applications in a variety of fields, ranging from biotechnology, to wearable sensors for healthcare and motion detection, to quantum transport, communications, and metrology. We report room-temperature zero-bias thermoelectric photodetectors, based on single- and polycrystal graphene grown by chemical vapor deposition (CVD), tunable over the whole terahertz range (0.1-10 THz) by selecting the resonance of an on-chip patterned nanoantenna. Efficient light detection with noise equivalent powers <1 nWHz<sup>-1/2</sup> and response time ∼5 ns at room temperature are demonstrated. This combination of specifications is orders of magnitude better than any previous CVD graphene photoreceiver operating in the sub-THz and THz range. These state-of-the-art performances and the possibility of upscaling to multipixel architectures on complementary metal-oxide-semiconductor platforms are the starting points for the realization of cost-effective THz cameras in a frequency range still not covered by commercially available microbolometer arrays.
Chemical Vapor Deposition, Graphene, Nanophotonics, Terahertz, Photodetectors
Engineering and Physical Sciences Research Council (EP/K017144/1, EP/K01711X/1, EP/L016087/1, EP/N010345/1)
H2020 Future and Emerging Technologies (801464)
Marie Curie (MSCA-ITN-2)
European Research Council (842251, 319277, 681379)
External DOI: https://doi.org/10.1021/acsnano.1c06432
This record's URL: https://www.repository.cam.ac.uk/handle/1810/332179
Attribution-NonCommercial-NoDerivatives 4.0 International
Licence URL: https://creativecommons.org/licenses/by-nc-nd/4.0/