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Hassan Aghababaeian,Mohammad-Hashem Vadjed-Samiei 한국광학회 2012 Current Optics and Photonics Vol.16 No.3
In this paper, we have proposed a principle to design a compact and temperature independent electro-optic switch based on a slotted photonic crystal directional coupler (SPCDC). Infiltration of the slotted silicon photonic crystal with polymer enhances the slow light and decreases the switching length,whereas the different signs of thermo-optic coefficients of the polymer and silicon make the proposed switch stable within 25℃ to 85℃ temperature range. The SPCDC structure is modified to increase poling efficiency of the polymer in the slot and to flatten the dispersion diagram of the even mode to minimize the switching length.
Temperature Stabilization of Group Index in Silicon Slotted Photonic Crystal Waveguides
Hassan Aghababaeian,Mohammad-Hashem Vadjed-Samiei,Nosrat Granpayeh 한국광학회 2011 Current Optics and Photonics Vol.15 No.4
In this paper, we have proposed a principle to design wideband, low dispersion and temperature stabilized slow light structure in slotted photonic crystal waveguide (SPCW). The infiltration of the silicon photonic crystal with polymer will enhance the slow light and increase the group index, whereas the different signs of thermo-optic coefficients of polymer and silicon make the proposed structure stable on temperature variation over 60℃ and improves the group index-bandwidth products of the designed structure. The SPCW structure is modified to maximize the slow light effect and minimize the dependence of the group index and hence the group velocity dispersion to temperature.
Performance Enhancement of Cavity Assisted Photonic Crystal De-Multiplexer in Slow Light Regime
Mohammad-Hashem Vadjed-Samiei,Hassan Aghababaeian 한국광학회 2016 Current Optics and Photonics Vol.20 No.3
This study first proposes a new version of a photonic crystal based de-multiplexer operating under theslow light regime, secondly analyses the structure numerically to demonstrate de-multiplexing operationand finally studies the impact of light speed on the performance of the proposed structure. The operationwavelength is 1.55 μm. The study indicates that, by adjusting the speed of light, around 0.1C, in the mainwaveguide and in the output channels’ waveguides, an enhancement in the performance of the de-multiplexerwill be gained.