Active and Passive Tuning of Ultranarrow Resonances in Polaritonic Nanoantennas
Name
Advanced Materials - 2022 - Duan - Active and Passive Tuning of Ultranarrow Resonances in Polaritonic Nanoantennas.pdf
Description
Published version
Size
1.73 MB
Format
Adobe PDF
Checksum (MD5)
100fe36a67d596b1e9d6aba9600e065d
Author(s)
Duan, Jiahua
Alfaro‐Mozaz, Francisco Javier
Taboada‐Gutiérrez, Javier
Dolado, Irene
Álvarez‐Pérez, Gonzalo
Titova, Elena
Bylinkin, Andrei
Tresguerres‐Mata, Ana Isabel F
Martín‐Sánchez, Javier
Liu, Song
Date Issued
March 2022
Journal
Advanced Materials
Publisher
Wiley
Citation
Duan, Jiahua, Alfaro‐Mozaz, Francisco Javier, Taboada‐Gutiérrez, Javier, Dolado, Irene, Álvarez‐Pérez, Gonzalo et al. 2022. "Active and Passive Tuning of Ultranarrow Resonances in Polaritonic Nanoantennas." Advanced Materials, 34 (10).
Version
Final published version
Abstract
Optical nanoantennas are of great importance for photonic devices and spectroscopy due to their capability of squeezing light at the nanoscale and enhancing light-matter interactions. Among them, nanoantennas made of polar crystals supporting phonon polaritons (phononic nanoantennas) exhibit the highest quality factors. This is due to the low optical losses inherent in these materials, which, however, hinder the spectral tuning of the nanoantennas due to their dielectric nature. Here, active and passive tuning of ultranarrow resonances in phononic nanoantennas is realized over a wide spectral range (≈35 cm-1 , being the resonance linewidth ≈9 cm-1 ), monitored by near-field nanoscopy. To do that, the local environment of a single nanoantenna made of hexagonal boron nitride is modified by placing it on different polar substrates, such as quartz and 4H-silicon carbide, or covering it with layers of a high-refractive-index van der Waals crystal (WSe2 ). Importantly, active tuning of the nanoantenna polaritonic resonances is demonstrated by placing it on top of a gated graphene monolayer in which the Fermi energy is varied. This work presents the realization of tunable polaritonic nanoantennas with ultranarrow resonances, which can find applications in active nanooptics and (bio)sensing.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1002/adma.202104954
