Εξειδίκευση τύπου :	Κεφάλαιο σε πρακτικά συνεδρίου
Τίτλος:	Analysis and Design of Vector Holographic Metasurfaces
Δημιουργός/Συγγραφέας:	Pitilakis, A. [EL] Τσιλιπάκος Οδυσσέας[EN] Tsilipakos, Odysseas Tasolamprou, A. C. Tsioliaridou, A. Kantartzis, N. V. Ioannidis, S. Liaskos, C. Kafesaki, M.
Ημερομηνία:	2024
Γλώσσα:	Αγγλικά
ISBN:	979-8-3503-7590-9
DOI:	10.1109/PIERS62282.2024.10618760
Περίληψη:	In this work we present a comprehensive framework for the analysis and design of vector holographic metasurfaces (VHMS). The term vector refers to the metasurface ability to manipulate the polarization of the scattered wave, while holographic refers to the configuration of the metasurface aperture, which can have any arbitrary complex profile in its equivalent surface impedance (phase and/or magnitude). We start from the presentation of the analysis of such VHMS, i.e., the calculation of its scattering under given equivalent surface impedance configuration and illumination; the analysis relies on physical optics and can, in theory, model the scattering and diffraction by a finite-aperture metasurface of arbitrary convex shape under arbitrary spatially coherent wavefront illumination. We then present the VHMS design and synthesis procedure, i.e., we compute its equivalent and physical configuration, when given the illuminating wavefront and the desired scattering response or functionality, e.g., beam steering or focusing. For the synthesis, we use a simple scalable unit cell topology incorporating square conductor patches interconnected with lumped complex loads; these can locally and continuously tune the VHMS phase and amplitude response, with independent control over both polarizations, thus allowing arbitrary incident-to-scattered wavefront transformations. These versatile devices, especially when fused with wavefront sensing capabilities, can be used in applications spanning wireless communications (e.g., beamforming, integrated/joint sensing and communication, or programmable wireless environments), radar scattering (e.g., stealth), and holography/imaging.
Ημ/νία έναρξης εκδήλωσης :	2024-04-21
Ημ/νία λήξης εκδήλωσης :	2024-04-25
Τόπος εκδήλωσης:	Chengdu, China
Τίτλος πηγής δημοσίευσης:	2024 Photonics & Electromagnetics Research Symposium (PIERS)
Θεματική Κατηγορία:	[EL] Οπτική. Φώς[EN] Optics. Light [EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry
Λέξεις-Κλειδιά:	Wireless communication Surface impedance Surface waves Scattering Physical optics Lighting Metasurfaces
Ηλεκτρονική διεύθυνση στον εκδότη (link):	doi.org/10.1109/PIERS62282.2024.10618760
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο