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Analysis of a Triangular-shaped Plasmonic Metal-Insulator-Metal Bragg Grating Waveguide
Behnaz Jafarian,Najmeh Nozhat,Nosrat Granpayeh 한국광학회 2011 Current Optics and Photonics Vol.15 No.2
A novel triangular-shaped plasmonic metal-insulator-metal (MIM) Bragg grating waveguide is introduced,whose band-gap is narrower than that of the conventional step type and wider than that of the sawtoothshaped one. Moreover apodized triangular-shaped MIM Bragg grating structures are proposed in order to reduce the side lobes of the transmission spectrum, because the Bragg reflector with a sawtooth profile has a smoother transmission spectrum than that of a triangular-shaped one. The performance of the proposed structures is simulated by using the finite difference time domain method.