Georgios Sinatkas

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Electro-optic phase modulation schemes are investigated by inducing carrier-concentration changes in transparent conducting oxide semiconductors, integrated in well-established silicon-photonic platforms. By exploiting the epsilon-near-zero effect, binary phase-shift keying modulation is manifested, resulting in high-speed modulation solutions of reduced(More)
We present optical devices that employ free-carrier effects for routing and modulation applications. By electrically controlling the carrier concentration in indium tin oxide, we realize an electro-optic modulator employing the silicon slot waveguide platform. Moreover, using the free-carrier effects in undoped silicon, we demonstrate an optical clock(More)
We develop a perturbation theory framework for modeling nonlinear resonators comprising dispersive sheet materials. It is applied to model optical bistability with graphene-based nonlinear resonant structures in the THz and near-infrared regimes.
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