Szczegóły publikacji

Opis bibliograficzny

Ultrafast dynamics in strongly-coupled plasmonic metasurfaces / The Linh Pham, Amirmostafa Amirjani, Kacper PILARCZYK, Fei Han, Nils Deßmann, Joris Van de Vondel, Thanh Tung Nguyen, Ewald Janssen // Laser & Photonics Reviews [Dokument elektroniczny]. — Czasopismo elektroniczne ; ISSN  1863-8899 . — 2026 — vol. 20 iss. 9 art. no. e03113, s. 1–9. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 8–9, Abstr. — Publikacja dostępna online od: 2026-02-19. — K. Pilarczyk - dod. afiliacja: KU Leuven, Belgium

Autorzy (8)

  • Pham The Linh
  • Amirjani Amirmostafa
  • AGHPilarczyk Kacper
  • Han Fei
  • Deßmann Nils
  • van de Vondel Joris
  • Nguyen Thanh Tung
  • Janssens Ewald

Słowa kluczowe

plasmonic metasurfaceultrafast light matter interactionsplasmon induced transparencynear field couplingmid-infrared pump probe spectroscopy

Dane bibliometryczne

ID BaDAP168275
Data dodania do BaDAP2026-06-30
Tekst źródłowyURL
DOI10.1002/lpor.202503113
Rok publikacji2026
Typ publikacjiartykuł w czasopiśmie
Otwarty dostęptak
Czasopismo/seriaLaser & Photonics Reviews

Abstract

Strongly coupled plasmonic metasurfaces provide a platform for probing ultrafast light–matter interactions, yet their dynamic response under intense optical excitation remains largely unexplored. Here, we investigate the temporal behavior in metasurfaces composed of adjacent gold dipole and quadrupole resonators on a silicon substrate using time-resolved mid-infrared pump–probe spectroscopy. Their near-field coupling across nanometric gaps facilitates destructive interference and creates a narrow plasmon-induced transparency (PIT) window. Aside from a transmission increase that lasts several tens of picoseconds as a result of impact ionization, the strongly coupled metasurfaces exhibit an instantaneous sub-ps transmission spike. We attribute this feature to direct field-driven interaction that, under strong coupling, simultaneously excites hybrid modes to enable coherent energy exchange—a channel absent in isolated or weakly coupled structures. Notwithstanding these dynamics, the PIT resonance profile evidences a robust, strong near-field coupling. Numerical analysis reveals the temporal evolution of the bright and dark modes’ damping rates, as well as the inter-resonator coupling coefficient. Those results establish a well-grounded mechanism for ultrafast mid-infrared all-optical modulation and unveil a previously hidden, ultrafast nonlinearity inherent to strongly coupled plasmonic metasurfaces.