Abstract
Quantum Controlled NOT (CNOT) gate is a well known logic gate in the world of quantum computing and data processing from application point of view. Recently, photonic crystal based logic gates have attracted increasing attention from researchers due to their compact size, low power requirement, high speed, simplified design, better confinement and ability for integration in optical network. In this paper, we have designed and simulated all-optical CNOT gate based on two-dimensional photonic crystal composed of hexagonal lattice of silicon (Si) rods arranged in air background. The operation of the proposed structure is based on the phenomenon of interference of light waves. Finite difference time domain and plane wave expansion methods have been used to simulate the proposed structure. We have found the contrast ratios at the output ports are 16.66 dB and 16.02 dB respectively. The response time of the proposed structure is 0.612 ps and can operate at a bit rate of 1.63 Tbps. The proposed structure offers fast response time and high contrast ratios that ensure efficient performance and make it suitable for high speed optical integrated circuits.
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The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
The authors acknowledge the Department of Science and Technology (Govt. of India) for providing INSPIRE fellowship to one of the authors.
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The authors acknowledge the financial support received from the DST-INSPIRE, Government of India for extending a research fellowship to Snigdha Hazra.
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by SH and SM. The first draft of the manuscript was written by SH and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Hazra, S., Mukhopadhyay, S. Two-dimensional photonic crystal based optical CNOT gate. Opt Quant Electron 55, 961 (2023). https://doi.org/10.1007/s11082-023-05228-3
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DOI: https://doi.org/10.1007/s11082-023-05228-3