DataVXAdvanced MaterialsPaper
journal article·2022-03Open access

Active and Passive Tuning of Ultranarrow Resonances in Polaritonic Nanoantennas

Jiahua Duan, Francisco Javier Alfaro‐Mozaz, Javier Taboada‐Gutiérrez, Irene Dolado, Gonzalo Álvarez‐Pérez, Elena Titova, Andrei Bylinkin, Ana Isabel F. Tresguerres‐Mata, Javier Martín‐Sánchez, Song Liu, James H. Edgar, Denis A. Bandurin, Pablo Jarillo‐Herrero, Rainer Hillenbrand, Alexey Y. Nikitin, Pablo Alonso‐González

Advanced Materials· Volume 34· Issue 10
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Source abstract

Abstract

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.
Source: crossref · Quality: baseline

Research context

Nanomaterials

OpenAlex topics: Plasmonic and Surface Plasmon Research · Thermal Radiation and Cooling Technologies · Strong Light-Matter Interactions

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Physics University of Oviedo Oviedo 33006 Spain

Center of Research on Nanomaterials and Nanotechnology CINN (CSIC–Universidad de Oviedo) El Entrego 33940 Spain

CIC nanoGUNE BRTA Donostia‐San Sebastian 20018 Spain

Programmable Functional Materials Lab Brain and Consciousness Research Center Moscow 121205 Russia

Center for Photonics and 2D Materials Moscow Institute of Physics and Technology Dolgoprudny 141701 Russia

Donostia International Physics Center (DIPC) Donostia‐San Sebastian 20018 Spain

Tim Taylor Department of Chemical Engineering Kansas State University Manhattan KS 66506 USA

Department of Physics Massachusetts Institute of Technology (MIT) Boston MA 02139 USA

IKERBASQUE Basque Foundation for Science Bilbao 48013 Spain

CIC nanoGUNE BRTA and Department of Electricity and Electronics EHU/UPV Donostia‐San Sebastián 20018 Spain

Funding

Ministerio de Ciencia e Innovación · European Research Council · Gobierno del Principado de Asturias · National Science Foundation · Eusko Jaurlaritza · Air Force Office of Scientific Research

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