Prof. Amer Kotb from Egypt gave a lecture on silicon waveguides for the eighth session of the CIOMP Forum on August 19, 2022.

Prof. Kotb, from Fayoum University in Egypt, is a CAS President's International Fellowship Initiative (PIFI) funded scholar currently working with the GPL Photonics Laboratory, CIOMP.

He is mainly engaged in research on all-optical logic gates using different types of SOAs, plasmonic waveguides, and computational photonics.

Prof. Kotb’s lecture was titled “Silicon waveguides-based all-optical logic gates”, in which he covered his current work as “silicon-on-silica waveguides have been employed for the all-optical realization of a complete family of logic gates, including NOT, XOR, AND, OR, NOR, NAND, and XNOR operated at telecommunication wavelengths. This waveguide consists of identical slots and microring resonators, all made of silicon patterned on silica. The principle of operation of these logic gates is based on the constructive and destructive interference induced by the phase difference between the input signals. The gates’ performance is evaluated against the contrast ratio (CR) metric. Compared to existing waveguides, the proposed waveguides achieve higher CRs with a high speed.”

After the lecture and a Q&A session, Prof. Kotb thanked the GPL Lab and CIOMP for providing him an excellent research platform and environment, and said that he would continue to carry out in-depth cooperation with these two organizations and expect to produce more excellent results.