Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Ultrafast All‐Optical Control of Light Chirality with Nanostructured Graphene
Δημιουργός/Συγγραφέας:	Matthaiakakis, Nikolaos Droulias, Sotiris [EL] Κακαράντζας, Γεώργιος[EN] Kakarantzas, George
Ημερομηνία:	2024
Γλώσσα:	Αγγλικά
ISSN:	2195-1071 2195-1071
DOI:	10.1002/adom.202303181
Περίληψη:	Ultrafast nanophotonics is a rapidly growing area of study focused on creating nanodevices that can modulate the properties of light at, to this date, unparalleled speed. To facilitate the growth of this field, there is a growing need for compact metamaterial designs for the manipulation of the amplitude, phase, and polarization of light. One promising strategy involves leveraging the optical nonlinearity of nanostructured materials to alter their permittivity by interacting with high-intensity ultrashort laser pulses. This study showcases how such requirements can be met through the utilization of 2D materials, particularly graphene. The nonlinear optical response of a graphene nanorectangle array is theoretically modeled to achieve all-optical, fully reversible, broadband, and ultrafast dynamic control of light chirality. This is achieved by taking advantage of the energy relaxation dynamics of coherently excited localized plasmons supported by the metasurface, and the transient increase in electron temperature in graphene. Using finite-difference time-domain simulations, ultrafast dynamic tuning between circular and linearly polarized light is demonstrated. The proposed platform gives promise for ultrathin, CMOS-compatible nanophotonic systems that can provide high-speed, room-temperature modulation of light polarization.
Τίτλος πηγής δημοσίευσης:	Advanced Optical Materials
Τόμος/Κεφάλαιο:	12
Τεύχος:	16
Θεματική Κατηγορία:	[EL] Εφαρμοσμένη οπτική. Φωτονική[EN] Applied optics. Photonics [EL] Νανοτεχνολογία[EN] Nanotechnology
Λέξεις-Κλειδιά:	all-optical circularly polarized light graphene metasurface localized surface plasmons ultrafast
Κάτοχος πνευματικών δικαιωμάτων:	© 2024 The Authors. Advanced Optical Materials published byWiley-VCH GmbH.
Όροι και προϋποθέσεις δικαιωμάτων:	This is an open access article under the terms of theCreative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://doi.org/10.1002/adom.202303181
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο