title: Superabsorption of light via quantum engineering.
abstract: Almost 60 years ago Dicke introduced the term superradiance to describe a signature quantum effect: N atoms can collectively emit light at a rate proportional to N(2). Structures that superradiate must also have enhanced absorption, but the former always dominates in natural systems. Here we show that this restriction can be overcome by combining several well-established quantum control techniques. Our analytical and numerical calculations show that superabsorption can then be achieved and sustained in certain simple nanostructures, by trapping the system in a highly excited state through transition rate engineering. This opens the prospect of a new class of quantum nanotechnology with potential applications including photon detection and light-based power transmission. An array of quantum dots or a molecular ring structure could provide a suitable platform for an experimental demonstration.
authors.affiliation: Department of Materials, Oxford University, Oxford OX1 3PH, UK.
authors.forename: K D B
authors.initials: KD
authors.lastname: Higgins
authors.affiliation: 1] Department of Materials, Oxford University, Oxford OX1 3PH, UK [2] Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, Singapore 117543, Singapore.
authors.forename: S C
authors.initials: SC
authors.lastname: Benjamin
authors.affiliation: Centre for Engineered Quantum Systems, School of Mathematics and Physics, The University of Queensland, St Lucia, Queensland 4072, Australia.
authors.forename: T M
authors.initials: TM
authors.lastname: Stace
authors.affiliation: Centre for Engineered Quantum Systems, School of Mathematics and Physics, The University of Queensland, St Lucia, Queensland 4072, Australia.
authors.forename: G J
authors.initials: GJ
authors.lastname: Milburn
authors.affiliation: SUPA, School of Physics and Astronomy, University of St Andrews, St Andrews, KY16 9SS, UK.
authors.forename: B W
authors.initials: BW
authors.lastname: Lovett
authors.affiliation: 1] Department of Materials, Oxford University, Oxford OX1 3PH, UK [2] Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, Singapore 117543, Singapore.
authors.forename: E M
authors.initials: EM
authors.lastname: Gauger