Investigation of response time of small footprint photonic crystal AND logic gate
- PDF / 782,258 Bytes
- 4 Pages / 595.22 x 842 pts (A4) Page_size
- 6 Downloads / 173 Views
Vol.16 No.6, 1 November 2020
Investigation of response time of small footprint photonic crystal AND logic gate Ahmad Mohebzadeh-Bahabady1 and Saeed Olyaee2* 1. Faculty of Electrical Engineering, Shahid Rajaee Teacher Training University, Tehran 16788-15811, Iran 2. Nano-photonics and Optoelectronics Research Laboratory, Shahid Rajaee Teacher Training University, Tehran 16788-15811, Iran1 (Received 29 March 2020; Revised 15 May 2020) ©Tianjin University of Technology and Springer-Verlag GmbH Germany, part of Springer Nature 2020 In this paper, the response time of all-optical AND logic gate using the triangular photonic crystal lattice is investigated. The proposed logic gate consists of a photonic crystal nano-resonator formed by changing the size of the dielectric rods. The structure benefits the interference effect mechanism. The contrast ratio of the photonic crystal AND logic gate is obtained as 6 dB. In addition to simplicity, the designed nano-resonator increases the bit rate of logic gate. The delay time and footprint of logic gate are respectively 0.32 ps and 146 μm2. The proposed photonic crystal AND logic gate can operate at a bit rate of 3.12 Tbit/s Document code: A Article ID: 1673-1905(2020)06-0477-4 DOI https://doi.org/10.1007/s11801-020-0056-4
In recent years, many efforts are being devoted to develop the optical computations by using photonic crystals. The information processing using the photonic crystals is one of the most sought-after technologies in photonics, because the photonic crystals are the most sophisticated optical materials to date[1]. On the other hand, optical devices can be widely used for sending and receiving the high bit rate data in optical communications compared to the electronic devices[2-4]. All-optical logic gates are important optical components in the optical communications and optical computations[4-9]. They can be categorized into quantum-dot semiconductor optical amplifiers[9], semiconductor optical amplifiers[10], and photonic crystals[11-13]. The optical devices such as lasers, logic gates, fibers, multiplexers/demultiplexers, sensors, and analog-to-digital converters (ADCs) can be implemented by using photonic crystal structures with small footprint and easily integrated into all-optical integrated circuits[14-17]. In order to realize the photonic crystal logic gates, linear and nonlinear materials may be used. In all-optical logic gates by using linear and nonlinear materials, the interference effect and the nonlinear Kerr effect are respectively utilized[18-21]. To reach the minimum optical power and high bit rate up to several tera-bit-per second, the photonic crystal logic gates based on the interference effect can be used. Younis et al designed a structure for AND/OR photonic crystal logic gates in 2014[22]. The optical power level for the logics “one” and “zero” needs to be greater and less than 0.8 and 0.4 of the input optical power, respectively, for AND logic gate operation. They * E-mail: [email protected]
reported the contrast ratio of 6 dB and the da
Data Loading...
