Design of all-optical full-subtractor with plasmonic waveguides for high-speed applications

Abstract

Combinational circuits that utilize solely optical means are crucial elements for processing optical information and are used in a wide variety of applications. Optical devices are the fundamental components of integrated circuits. In this paper, the fundamental structure of a full-subtractor circuit is generated utilizing Y-shaped plasmonic power splitter concept that employs the linear interference principle to produce the required output. This work is encapsulated within a 20 µm × 18 µm frame, and the extinction ratio (ER) of this model is 13.01 for both difference and borrow which is higher compared to other full-subtractor structures. This work introduces the first Y-shaped plasmonic all-optical full-subtractor structure. Various structure parameters such as transmission rate, response time, and bit rate are also calculated and analyzed. The transverse electric (TE) polarization of the intended device, that has an operational wavelength of 1.55 µm, is tailored toward optical communication.