Check out my recent talk at CLEO/Europe-EQEC conference (June
2021): "Optical Pulse Propagation in Graphene-comprising
Waveguides: Beyond the Perturbative Nonlinear Regime"
I will also be presenting a talk at the Metamaterials
conference (September 2021): "Design, Fabrication, and
Characterization of a Proof-of-Concept Multi-functional Microwave
Metasurface using Static Loads".
Research & Interests
My prime field of expertise is electromagnetics, theoretical and computational; specifically guided and radiated waves. My current research is focused in two (distinct) areas: graphene-enhanced nonlinear photonic devices and reconfigurable microwave metasurfaces. Here's a couple of my latest works:
- Asymmetric Si-Slot Coupler with Nonreciprocal Response Based on Graphene Saturable Absorption, IEEE JQE, 2021. [PDF@arXiv]
- A Multi-Functional Reconfigurable Metasurface: Electromagnetic Design Accounting for Fabrication Aspects, IEEE TAP, 2020. [PDF@arXiv]
My broader interests include silicon photonics, plasmonics, electro-optical phenomena, 2D material physics, metamaterials, liquid crystals, microstructured fibers, classical optics, optical fiber communications, mmWave & THz technology, antennas & propagation. Sounds a lot? Well, a researcher cannot always choose what to work on, and there's always an opportunity to learn new things :)
I have laboratory experience with optical fiber systems, free-space optics and RF/microwave technology.
I was born in Thessaloniki, in 1982, and got my 5-years MSc
diploma in Electrical and Computer
Engineering (ECE) with a specialization in
Telecommunications in 2005, from the engineering faculty of
the Aristotle University of Thessaloniki (AUTH). I hold another
MSc degree, awarded from ENST/Telecom Paris in
2007, including a 6-month internship at Alcatel-Lucent (now
Nokia Bell Labs) optical transmission group, where I worked on
dispersion managed heterogeneous optical fiber networks.
After my military service at the Hellenic Navy, I resumed research, now focused on integrated photonics, supervised by professor Emmanouil Kriezis, leading to a PhD granted in 2014 from ECE/AUTH. My doctorate thesis title is "Analysis, design and characterization of integrated photonic devices based on the hybrid conductor-dielectric-silicon technology" and you can find it here (in Greek, but you can still figure out the math and the figures!).
Since 2014, I've been working as a postdoctoral researcher affiliated with AUTH and FORTH (IESL and ICS), involved in a number of grants, scholarships and research projects, both national and European. Apart from R&D, I've served as an adjunct lecturer at ECE-AUTH (2016-2018) and also at the School of ECE of the University of Western Macedonia (2016-present), fully in charge of teaching senior year undergraduate courses: photonics, optics and antennas & propagation.
Throughout my involvement with research, from 2004 to this
day, I've developed scientific software and simulation tools
primarily in MATLAB. It's something that I enjoy and also find
useful; when both happen in the same project, so much the
better! So, my main tools are various 1D and 2D
full-vector mode-solvers and
beam-propagation methods (BPM), implemented with
analytical formulas (where possible, e.g., when a characteristic
equation can be formulated) or finite difference/element methods
(FDM/FEM), for complicated geometries. It's surprising how many
things one can do with only these tools!
Other, minor projects include coupled spatiotemporal ODEs (e.g.
multi-pulse propagation in nonlinear waveguides coupled with
carrier effects), ray/geometrical optics, and FDTD.
I'm also experienced in several commercial computer-aided engineering tools.
Here's some links relevant to me (profile pages, mostly).
- ECE Photonics: http://photonics.ee.auth.gr (Emmanouil Kriezis group)
- my Google Scholar: https://scholar.google.gr/citations?user=eh9cv90AAAAJ&hl=en
- my LinkedIn: https://www.linkedin.com/in/alexandros-pitilakis-9576272/
- my ResearchGate: https://www.researchgate.net/profile/Alexandros-Pitilakis
- my ORCID: http://orcid.org/0000-0001-5523-1621