Number-Resolved Single-Photon Detection with Ultralow Noise van der Waals Hybrid

Roy, Kallol and Ahmed, Tanweer and Dubey, Harshit and Sai, T Phanindra and Kashid, Ranjit and Maliakal, Shruti and Hsieh, Kimberly and Shamim, Saquib and Ghosh, Arindam (2018) Number-Resolved Single-Photon Detection with Ultralow Noise van der Waals Hybrid. In: ADVANCED MATERIALS, 30 (2).

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Abstract

Van der Waals hybrids of graphene and transition metal dichalcogenides exhibit an extremely large response to optical excitation, yet counting of photons with single-photon resolution is not achieved. Here, a dual-gated bilayer graphene (BLG) and molybdenum disulphide (MoS2) hybrid are demonstrated, where opening a band gap in the BLG allows extremely low channel (receiver) noise and large optical gain (approximate to 10(10)) simultaneously. The resulting device is capable of unambiguous determination of the Poissonian emission statistics of an optical source with single-photon resolution at an operating temperature of 80 K, dark count rate 0.07 Hz, and linear dynamic range of approximate to 40 dB. Single-shot number-resolved single-photon detection with van der Waals heterostructures may impact multiple technologies, including the linear optical quantum computation.

Item Type:	Journal Article
Publication:	ADVANCED MATERIALS
Publisher:	10.1002/adma.201704412
Additional Information:	Copy right for this article belongs to the WILEY-V C H VERLAG GMBH, POSTFACH 101161, 69451 WEINHEIM, GERMANY
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	02 Mar 2018 15:07
Last Modified:	02 Mar 2018 15:07
URI:	http://eprints.iisc.ac.in/id/eprint/58881

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