Efficient and continuous microwave photoconversion in hybrid cavity-semiconductor nanowire double quantum dot diodes

Waqar Khan, Patrick P. Potts, Sebastian Lehmann, Claes Thelander, Kimberly A. Dick, Peter Samuelsson and Ville F. Maisi ()
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Waqar Khan: Lund University
Patrick P. Potts: Lund University
Sebastian Lehmann: Lund University
Claes Thelander: Lund University
Kimberly A. Dick: Lund University
Peter Samuelsson: Lund University
Ville F. Maisi: Lund University

Nature Communications, 2021, vol. 12, issue 1, 1-7

Abstract: Abstract Converting incoming photons to electrical current is the key operation principle of optical photodetectors and it enables a host of emerging quantum information technologies. The leading approach for continuous and efficient detection in the optical domain builds on semiconductor photodiodes. However, there is a paucity of efficient and continuous photon detectors in the microwave regime, because photon energies are four to five orders of magnitude lower therein and conventional photodiodes do not have that sensitivity. Here we tackle this gap and demonstrate how microwave photons can be efficiently and continuously converted to electrical current in a high-quality, semiconducting nanowire double quantum dot resonantly coupled to a cavity. In particular, in our photodiode device, an absorbed photon gives rise to a single electron tunneling through the double dot, with a conversion efficiency reaching 6%.

Date: 2021
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DOI: 10.1038/s41467-021-25446-1

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