Journal
NATURE MATERIALS
Volume 16, Issue 2, Pages 182-194Publisher
NATURE RESEARCH
DOI: 10.1038/NMAT4792
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Funding
- DARPA grant [FA8650-16-2-7640]
- CNPq, through the PRONEX/FUNCAP program
- Office of Naval Research
- AFOSR MURI [FA9550-12-1-0488]
- Spanish Ministry of Economy and Competitiveness [MAT2014-53432-05-1-R]
- Spanish Ministry of Economy and Competitiveness, through the 'Severn Ochoa' Programme for Centres of Excellence in RD [SEV-2015-0522]
- Fundacio Cellex Barcelona
- European Union [604391, FP7-ICT-2013-613024-GRASP]
- ERC [307806]
- CNPq, through the Science Without Borders program
- ICREA Funding Source: Custom
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In recent years, enhanced light-matter interactions through a plethora of dipole-type polaritonic excitations have been observed in two-dimensional (2D) layered materials. In graphene, electrically tunable and highly confined plasmon-polaritons were predicted and observed, opening up opportunities for optoelectronics, bio-sensing and other mid-infrared applications. In hexagonal boron nitride, low-loss infrared-active phonon-polaritons exhibit hyperbolic behaviour for some frequencies, allowing for ray-like propagation exhibiting high quality factors and hyperlensing effects. In transition metal dichalcogenides, reduced screening in the 2D limit leads to optically prominent excitons with large binding energy, with these polaritonic modes having been recently observed with scanning near-field optical microscopy. Here, we review recent progress in state-of-theart experiments, and survey the vast library of polaritonic modes in 2D materials, their optical spectral properties, figures of merit and application space. Taken together, the emerging field of 2D material polaritonics and their hybrids provide enticing avenues for manipulating light-matter interactions across the visible, infrared to terahertz spectral ranges, with new optical control beyond what can be achieved using traditional bulk materials.
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