1. Nanometer-scale cavities for mid-infrared light based on graphene plasmons
- Author
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Itai Epstein, David Alcaraz, Zhiqin Huang, Varun-Varma Pusapati, Jean-Paul Hugonin, Avinash Kumar, Xander Deputy, Tymofiy Khodkov, Tatiana G. Rappoport, Jin-Yong Hong, Nuno M. M. R. Peres, Jing Kong, David R. Smith, and Frank H. Koppens
- Subjects
Physics ,Graphene ,business.industry ,Terahertz radiation ,Physics::Optics ,Spectral line ,law.invention ,Momentum ,Wavelength ,law ,Optoelectronics ,Nanometre ,business ,Plasmon ,Excitation - Abstract
Acoustic-graphene-plasmons (AGPs) are highly confined electromagnetic modes, which carry extreme momentum and low loss in the Mid-infrared (MIR) to Terahertz (THz) spectra. They are therefore enablers of extremely strong light-matter interactions at these long wavelengths. However, owing to their large momentum they are also challenging to excite and detect. Here, we demonstrate a new way to excite AGPs that are confined to nanometric-scale cavities directly from the far-field, via localized graphene-plasmon-magnetic-resonators (GPMRs). This approach enables the efficient excitation of single AGP cavities, which are able to confine MIR light to record-breaking ultra-small mode-volumes, which are over a billion times smaller than their free-space volume.
- Published
- 2021
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