• Photonics Research
  • Vol. 6, Issue 5, 427 (2018)
Eesa Rahimi1、2 and Kürşat Şendur1、*
Author Affiliations
  • 1Faculty of Engineering and Natural Science, Sabanci University, Istanbul 34956, Turkey
  • 2e-mail: eesa@sabanciuniv.edu
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    DOI: 10.1364/PRJ.6.000427 Cite this Article Set citation alerts
    Eesa Rahimi, Kürşat Şendur. Chimera states in plasmonic nanoresonators[J]. Photonics Research, 2018, 6(5): 427 Copy Citation Text show less

    Abstract

    The chimera state is the concurrent combination of synchronous and incoherent oscillations in a set of identical oscillators. In this study, we demonstrate the states for optical nanoresonators where the oscillators are designed based on a plasmonic dimer cavity. This resonator interchanges radiative energy with an active medium located at its hotspot, and therefore forms an amplitude-mediated oscillating system. Finite-difference time-domain (FDTD)-based numerical analysis of a circular array of the coupled oscillators reveals that regardless of identical nature, oscillator phase is not concordant over time for all members. The effect of coupling strength on the phase escape/synchronization of the oscillators is investigated for the plasmonic nanoresonator system. It is shown that for identical oscillators, which are placed symmetrically over the perimeter of a disc, the array can be divided to several subgroups of concurrent coherent and incoherent members. While the oscillator of each subgroup seems to be locked together, one member can escape from synchronization for a while and return to coherency, or it can sync with the other groups. The effect of coupling strength and number of oscillators on the phase-escape pace is studied for this system, and strong coupling is shown to force the array members to fully synchronize while weaker coupling causes chimera states in the array.
    d2P21/dt2+γ21dP21/dt+ω212P21=ζ21(N2N1)E,(1)

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    d2P30/dt2+γ30dP30/dt+ω302P30=ζ30(N3N0)E.(2)

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    dN3/dt=N3(1N2)/τ32N3(1N0)/τ30+dP30/dt·E/hω30,(3)

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    dN2/dt=N3(1N2)/τ32N2(1N1)/τ21+dP21/dt·E/hω21,(4)

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    dN1/dt=N2(1N1)/τ21N1(1N0)/τ10dP21/dt·E/hω21,(5)

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    dN0/dt=N3(1N0)/τ30+N1(1N0)/τ10dP30/dt·E/hω30.(6)

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    Ni/Nj=1/{1+α·exp[(EiEj)/kT]}.(7)

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    φm(t)=ω30t+arctan{Σn=1:NIm[Emn(t)]/Σn=1:NRe[Emn(t)]},(8)

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    φk=<Em(kΔt)ω30kΔt.(9)

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    Eesa Rahimi, Kürşat Şendur. Chimera states in plasmonic nanoresonators[J]. Photonics Research, 2018, 6(5): 427
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