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dc.contributor.authorHiggins, Kieran
dc.contributor.authorLovett, Brendon William
dc.contributor.authorGauger, Erik
dc.identifier.citationHiggins , K , Lovett , B W & Gauger , E 2017 , ' Quantum-enhanced capture of photons using optical ratchet states ' , Journal of Physical Chemistry C , vol. 121 , no. 38 , pp. 20714–20719 .
dc.identifier.otherPURE: 251117881
dc.identifier.otherPURE UUID: 6ed7993f-8df4-464d-a42e-daea79ef1f69
dc.identifier.otherScopus: 85030450603
dc.identifier.otherORCID: /0000-0001-5142-9585/work/47136562
dc.identifier.otherWOS: 000412150500018
dc.descriptionThis work was supported by the EPSRC and the Leverhulme Trust. BWL thanks the Royal Society for a University Research Fellowship. EMG acknowledges support from the Royal Society of Edinburgh and the Scottish Government.en
dc.description.abstractNatural and artificial light harvesting systems often operate in a regime where the flux of photons is relatively low. Besides absorbing as many photons as possible, it is paramount to prevent excitons from annihilation via photon re-emission until they have undergone an irreversible energy conversion process. Taking inspiration from photosynthetic antenna structures, we here consider ringlike systems and introduce a class of states we call ratchets: excited states capable of absorbing but not emitting light. This allows our antennae to absorb further photons while retaining the excitations from those that have already been captured. Simulations for a ring of four sites reveal a peak power enhancement by up to a factor of 35 owing to a combination of ratcheting and the prevention of emission through dark-state population. In the slow extraction limit, the achievable power enhancement due to ratcheting alone exceeds 20%.
dc.relation.ispartofJournal of Physical Chemistry Cen
dc.rightsCopyright © 2017 American Chemical Society. This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes.en
dc.subjectQC Physicsen
dc.subjectQD Chemistryen
dc.subjectTK Electrical engineering. Electronics Nuclear engineeringen
dc.titleQuantum-enhanced capture of photons using optical ratchet statesen
dc.typeJournal articleen
dc.contributor.sponsorThe Royal Societyen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. Condensed Matter Physicsen
dc.description.statusPeer revieweden

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