Researcher:
Özok, Yasa Ekşioğlu

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PhD Student

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Yasa Ekşioğlu

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Özok

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Özok, Yasa Ekşioğlu

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2011 - 20134

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Researcher Of Publications: search.filters.isAuthorOfPublication.b1767af9-aeaa-489b-a826-b2294f770789

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    Dynamical properties of a coupled nonlinear dielectric waveguide - surface-plasmon system as a new type of josephson junction
    (IEEE, 2011) N/A; Department of Physics; N/A; Department of Physics; Müstecaplıoğlu, Özgür Esat; Özok, Yasa Ekşioğlu; Güven, Kaan; Faculty Member; PhD Student; Faculty Member; Department of Physics; College of Sciences; Graduate School of Sciences and Engineering; College of Sciences; 1674; 237974; 52290
    We demonstrate that a weakly-coupled nonlinear dielectric waveguide surface-plasmon (DWSP-JJ) system can be formulated as in analogy to bosonic Josephson junction of atomic condensates, yet the inherently dynamic coupling parameter generates novel features in the phase space.
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    PublicationOpen Access
    Dynamical properties of a coupled nonlinear dielectric waveguide-surface-plasmon system as another type of Josephson junction
    (Society of Photo-optical Instrumentation Engineers (SPIE), 2011) Department of Physics; Özok, Yasa Ekşioğlu; Müstecaplıoğlu, Özgür Esat; Güven, Kaan; Faculty Member; Faculty Member; Department of Physics; College of Sciences; N/A; 1674; 52290
    We demonstrate that a weakly-coupled nonlinear dielectric waveguide surface-plasmon (DWSP-JJ) system can be formulated in analogy to bosonic Josephson junction of atomic condensates at very low temperatures, yet it exhibits different dynamical features. Such a system can be realized along a metal - dielectric interface where the dielectric medium hosts a nonlinear waveguide (e. g. fiber) for soliton propagation. The inherently dynamic coupling parameter generates novel features in the phase space.
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    PublicationOpen Access
    Dissipative Josephson junction of an optical soliton and a surface plasmon
    (American Physical Society (APS), 2013) Department of Physics; Özok, Yasa Ekşioğlu; Müstecaplıoğlu, Özgür Esat; Güven, Kaan; Faculty Member; Faculty Member; Department of Physics; College of Sciences; N/A; 1674; 52290
    We examine the dynamics of a dissipative photonic Josephson junction formed by the weak coupling of an optical soliton in a nonlinear dielectric waveguide and a co-propagating surface plasmon along a parallel metal surface with a linear dielectric spacer. We employ a heuristic model with a coupling function that depends on the soliton amplitude and consider two phenomenological dissipation mechanisms separately: angular-velocity dissipation and population imbalance dissipation. In the former dissipation mechanism, the system exhibits a phase-slip phenomenon where the odd-pi phase modes decay into even-pi phase modes. The latter damping mechanism sculptures the phase space significantly by introducing complex features, among which, Hopf-type bifurcations are notable. We show that some of the bifurcation points expand to stable limit cycles for certain regimes of the model parameters.
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    PublicationOpen Access
    Dynamical analysis of a weakly coupled nonlinear dielectric waveguide: surface-plasmon model as another type of Josephson junction
    (American Physical Society (APS), 2011) Department of Physics; Özok, Yasa Ekşioğlu; Müstecaplıoğlu, Özgür Esat; Güven, Kaan; Faculty Member; Faculty Member; Department of Physics; College of Sciences; N/A; 1674; 52290
    We propose that a weakly coupled nonlinear dielectric waveguide surface-plasmon system can be formulated as another type of Josephson junction. Such a system can be realized along a metal-dielectric interface where the dielectric medium hosts a nonlinear waveguide (e.g., fiber) for soliton propagation. We demonstrate that the system is in close analogy to the bosonic Josephson junction of atomic condensates at very low temperatures, yet exhibits different dynamical features. In particular, the inherently dynamic coupling parameter between soliton and surface plasmon generates self-trapped oscillatory states at nonzero fractional populations with zero and p time-averaged phase difference. The salient features of the dynamics are presented in the phase space.