Quantum dot lattice as nano-antenna for collective spontaneous emission

S. Mokhlespour, J.E.M. Haverkort, G.Y. Slepyan, S.A. Maksimenko, A. Hoffmann

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureHoofdstukAcademicpeer review


We present a theory for the collective spontaneous emission of timed Dicke states in a periodic 2D-array of quantum dots (QDs) coupled by dipoledipole (d-d) interactions. The master equation is first reformulated with respect to the timed Dicke basis. As a result, we obtain simple analytical relations for the spontaneous decay rate, collective Lamb shift and radiative pattern. The collective spontaneous emission in QD-array manifests itself in strong directivity, whereby the radiative pattern consists of a set of strong radiative lobes. The direction of the first lobe is dictated by the pumping direction, while the other lobes correspond to diffractive rays due to the periodicity. The influence of d-d interactions on the radiation decay of timed Dicke states in QD arrays is identical to the influence of an environment to single-particle excited states similar to the action of a structured photonic reservoir. For a rectangular 2D-array, the equivalent structured photonic reservoir has a form of a hollow rectangular waveguide with perfectly conductive walls. For lattice periods comparable to the radiation wavelength the decay rate shows sharp peaks due to Van-Hove singularities in the photonic density of states (PDOS) similar to the Purcell effect in photonic crystals. The optical nanoantenna under study allows tuning of the radiation pattern by varying the timing.

Originele taal-2Engels
TitelFundamental and Applied Nano-Electromagnetics
RedacteurenA. Maffucci , S.A. Maksimenko
Plaats van productieDordrecht
Aantal pagina's20
ISBN van elektronische versie978-94-017-7478-9
ISBN van geprinte versie978-94-017-7476-5
StatusGepubliceerd - 2016
EvenementFundamental and Applied NanoElectroMagnetics (FANEM 2015), May 25-27, 2015, Minsk, Belarus - Belarusian State University, Minsk, Wit-Rusland
Duur: 25 mei 201527 mei 2015

Publicatie series

NaamNATO Science for Peace and Security Series B: Physics and Biophysics
ISSN van geprinte versie18746500


WorkshopFundamental and Applied NanoElectroMagnetics (FANEM 2015), May 25-27, 2015, Minsk, Belarus
Verkorte titelFANEM 2015
Internet adres

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