Dr. Oleh Yermakov
V. N. Karazin Kharkiv National University
CV: Oleh Yermakov received the B.Sc. degree (cum laude) in Applied Physics from V. N. Karazin Kharkiv National University, Ukraine, in 2014, the M.Sc. degree in Photonics and Optical Information Technologies and PhD in Optics from ITMO University, St. Petersburg, Russia in 2016 and 2020, respectively. Since October 2019 he has been with V. N. Karazin Kharkiv National University. He is a member of SPIE, Optica, IEEE, EuMA international communities. His research interests include: photonics, plasmonics, surface waves, metasurfaces, fiber optics, polarization, spin-orbit photonics, numerical methods.
Presentation title: Metasurfaces for communications, sensing and energy
Abstract: Metasurfaces are two-dimensional periodic subwavelength nanostructures enabling to engineer light properties on demand. In this talk, we will discuss the main principles of metasurfaces and discover several related applications.
1. Metasurfaces for planar technologies. We show the extraordinary properties of metasurfaces allowing to control the in-plane highly localized optical signal paving a way towards the integrated circuits, on-chip devices and planar optical networks.
2. Metasurfaces for fiber optics. We demonstrate the enhancement of the light collection into fiber by several orders of magnitude via the fiber tip nanostructuring. Remote light collection is highly important for a plethora of applications including spectroscopy, endoscopy, biosensing, and quantum communications.
3. Metasurfaces for solar energy. One of the most significant factors responsible for optical losses in solar cells is the reflection of the light from their surface, whereas almost half of energy could be wasted. We propose the metasurface-based antireflective coatings boosting the capabilities of solar cells via the efficient broadband reflection suppression outperforming the existing counterparts.