Realization of all optical logic gates using universal NAND gates on photonic crystal platform. (September 2017)

• Record Type: Journal Article
• Authors: Rani, Preeti; Fatima, Shiba; Kalra, Yogita; Sinha, R.K.
• Is Part Of: Superlattices and microstructures. Volume 109(2017)
• Page Start: 619
• Page End: 625
• Publication Date: 2017-09
• Subjects: Photonic crystal -- All-optical logic gates -- Response period -- Bit rate; Superlattices as materials -- Periodicals; Microstructure -- Periodicals; Semiconductors -- Periodicals; Superréseaux -- Périodiques; Microstructure (Physique) -- Périodiques; Semiconducteurs -- Périodiques; 621.38152
• DOI: 10.1016/j.spmi.2017.05.046
• Languages: English
• ISSNs: 0749-6036

Abstract

Abstract: In this paper, the design of all-optical logic gates using the combination of universal NAND gates has been proposed. The photonic crystal structure consists of triangular lattice arrangement of air holes in silicon. Initially, the all optical NAND gate has been designed and optimized. Further, the optimized NAND gates have been used and arranged in a combination such that the combined structure behaves as an all-optical logic gate specifically, NOT, AND, OR, XOR and XNOR. The truth table for the designed all-optical logic gates has been verified at an operating wavelength of 1.55 μm. The proposed all optical gates exhibit a response period of 2.168 ps with a bit rate of 0.461 Tb/sec. Further, the contrast ratio for the designed gates has also been obtained. Highlights: All optical logic gates using combination of universal NAND gates have been proposed. The proposed gates have been characterized and required parameters have been obtained using PWE and FDTD method. The response period, bit rate and contrast ratio have been calculated at an operational wavelength of 1550 nm.