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    Energy equipartition and unidirectional emission in a spaser nanolaser

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    Type
    Article
    Authors
    Gongora, J. S. Totero cc
    Miroshnichenko, Andrey E.
    Kivshar, Yuri S.
    Fratalocchi, Andrea cc
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    PRIMALIGHT Research Group
    KAUST Grant Number
    CRG-1-2012-FRA-005
    Date
    2016-03-18
    Online Publication Date
    2016-03-18
    Print Publication Date
    2016-05
    Permanent link to this record
    http://hdl.handle.net/10754/607656
    
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    Abstract
    A spaser is a nanoplasmonic counterpart of a laser, with photons replaced by surface plasmon polaritons and a resonant cavity replaced by a metallic nanostructure supporting localized plasmonic modes. By combining analytical results and first-principle numerical simulations, we provide a comprehensive study of the ultrafast dynamics of a spaser. Due to its highly-nonlinear nature, the spaser is characterized by a large number of interacting degrees of freedom, which sustain a rich manifold of different phases we discover, describe and analyze here. In the regime of strong interaction, the system manifests an irreversible ergodic evolution towards the configuration where energy is equally shared among all the available degrees of freedom. Under this condition, the spaser generates ultrafast vortex-like lasing modes that are spinning on the femtosecond scale and whose direction of rotation is dictated by quantum noise. In this regime, the spaser acquires the character of a nanoparticle with an effective spin. This opens up a range of interesting possibilities for achieving unidirectional emission from a symmetric nanostructure, stimulating a broad range of applications for nanoplasmonic lasers as unidirectional couplers and random information sources.
    Citation
    Energy equipartition and unidirectional emission in a spaser nanolaser 2016:n/a Laser & Photonics Reviews
    Sponsors
    For the computer time, we have used the resources of the KAUST Supercomputing Laboratory. This work is part of the research program of “Kaust Optics and plasmonics for efficient energy harvesting” (Award No. CRG-1-2012-FRA-005) and it was also supported by the Australian Research Council.
    Publisher
    Wiley
    Journal
    Laser & Photonics Reviews
    DOI
    10.1002/lpor.201500239
    Additional Links
    http://doi.wiley.com/10.1002/lpor.201500239
    ae974a485f413a2113503eed53cd6c53
    10.1002/lpor.201500239
    Scopus Count
    Collections
    Articles; PRIMALIGHT Research Group; Electrical and Computer Engineering Program; Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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