Photonics Seminar Series: Fahmy Yousry, MSc-2

On the 05th of April 2023, as part of the Photonics Seminar Series, we will have the pleasure to have Skoltech Master student Fahmy Yousry present his research results.

When:  On the 05th of April 2023, Wednesday, at 17:00 MSK time
Where: New Campus room E-B2-3007 BigBlueButton

Fahmy Yousry will discuss “Active photonic devices utilizing epsilon-near-zero and nonlinear properties of transparent conductive oxides”.

fahmy-yousry3About the speaker:

For his bachelor’s Fahmy Yousry studied high energy physics at the University of Science and Technology in Zewail City in Egypt. Currently, he is a second-year master’s student in the Plasmonics lab under the supervision of Dr. Ivan Pshenichnyuk. His research revolves around the development of active photonic devices using indium tin oxide as an active material. He is interested in the design of photonic devices aimed at all-optical signal processing.


Active photonic devices are the pillar of signal processing and computation. Indium tin oxide (ITO) – a commercially available transparent conductive oxide – is well established as an electrically active material for optical switching. In this work, indium tin oxide is investigated as an active nonlinear material in epsilon-near-zero regime for optical switching, through electromagnetic numerical simulation in the frequency domain. Both electrical and optical schemes of activation are compared in terms of the average refractive index change for the same geometry based on silicon technology. Optical activation induces an average refractive index change in the order of 10-1, while electrical activation was in the order of 10-2. This could be utilized for both amplitude switching with 10.41 dB switching depth and phase switching with 70°/μm with 10 dB losses. Finally, the effects of adding a layer of ITO on both optical and plasmonic modes are studied.