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Near‐Infrared Tunable Surface Lattice Induced Transparency in a Plasmonic Metasurface
Author(s) -
Michaeli Lior,
Suchowski Haim,
Ellenbogen Tal
Publication year - 2020
Publication title -
laser and photonics reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.778
H-Index - 116
eISSN - 1863-8899
pISSN - 1863-8880
DOI - 10.1002/lpor.201900204
Subject(s) - plasmon , finite difference time domain method , surface plasmon , optics , materials science , scattering , lattice (music) , infrared , dispersion (optics) , discrete dipole approximation , broadband , optoelectronics , dipole , surface wave , group delay and phase delay , physics , bandwidth (computing) , telecommunications , quantum mechanics , computer science , acoustics
Collective coherent scattering at the surface of a plasmonic nanoparticle array is shown to induce tunable transparency windows at the localized plasmon band. Broadband phase measurements show that the enhanced transmission is accompanied by a large anomalous dispersion, which leads to a group delay as large as ∼ 8 fs within only 40 nm thick sample. This effect occurs over a wide tunable spectral range of ∼ 200 nm , and appears for two distinct counter‐propagating surface waves. The experimental observations are in good agreement with calculations based on coupled dipole approximation (CDA) and with finite‐difference time‐domain (FDTD) simulations. This study opens the door for implementation in the fields of sensing, displays, optical buffering, tunable filtering, and nonlinear optics.