Optophononics with coupled quantum dots

Mark L. Kerfoot, Alexander O. Govorov, Cyprian Czarnocki, Davis Lu, Youstina N. Gad, Allan S. Bracker, Daniel Gammon and Michael Scheibner ()
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Mark L. Kerfoot: School of Natural Sciences, University of California, Merced
Alexander O. Govorov: Ohio University
Cyprian Czarnocki: School of Natural Sciences, University of California, Merced
Davis Lu: School of Natural Sciences, University of California, Merced
Youstina N. Gad: School of Natural Sciences, University of California, Merced
Allan S. Bracker: Naval Research Laboratory
Daniel Gammon: Naval Research Laboratory
Michael Scheibner: School of Natural Sciences, University of California, Merced

Nature Communications, 2014, vol. 5, issue 1, 1-6

Abstract: Abstract Modern technology is founded on the intimate understanding of how to utilize and control electrons. Next to electrons, nature uses phonons, quantized vibrations of an elastic structure, to carry energy, momentum and even information through solids. Phonons permeate the crystalline components of modern technology, yet in terms of technological utilization phonons are far from being on par with electrons. Here we demonstrate how phonons can be employed to render a single quantum dot pair optically transparent. This phonon-induced transparency is realized via the formation of a molecular polaron, the result of a Fano-type quantum interference, which proves that we have accomplished making typically incoherent and dissipative phonons behave in a coherent and non-dissipative manner. We find the transparency to be widely tunable by electronic and optical means. Thereby we show amplification of weakest coupling channels. We further outline the molecular polaron’s potential as a control element in phononic circuitry architecture.

Date: 2014
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DOI: 10.1038/ncomms4299

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