scholarly journals Far‐Field Excitation of Acoustic Graphene Plasmons with a Metamaterial Absorber

2020 ◽  
pp. 2000066
Author(s):  
Chunchao Wen ◽  
Xingqiao Chen ◽  
Jianfa Zhang ◽  
Wei Xu ◽  
Jie Luo ◽  
...  
Keyword(s):  
Metamaterial Absorber ◽  
Far Field ◽  
Graphene Plasmons ◽  
Field Excitation

scholarly journals Far-field nanoscale infrared spectroscopy of vibrational fingerprints of molecules with graphene plasmons

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Hai Hu ◽  
Xiaoxia Yang ◽  
Feng Zhai ◽  
Debo Hu ◽  
Ruina Liu ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Far Field ◽  
Graphene Plasmons

scholarly journals Harnessing ultraconfined graphene plasmons to probe the electrodynamics of superconductors

2021 ◽  
Vol 118 (4) ◽  
pp. e2012847118
Author(s):  
A. T. Costa ◽  
P. A. D. Gonçalves ◽  
D. N. Basov ◽  
Frank H. L. Koppens ◽  
N. Asger Mortensen ◽  
...  
Keyword(s):  
Near Field ◽  
Far Field ◽  
Purcell Effect ◽  
Near Field Optics ◽  
Higgs Mode ◽  
Graphene Plasmons ◽  
Quantum Emitters

We show that the Higgs mode of a superconductor, which is usually challenging to observe by far-field optics, can be made clearly visible using near-field optics by harnessing ultraconfined graphene plasmons. As near-field sources we investigate two examples: graphene plasmons and quantum emitters. In both cases the coupling to the Higgs mode is clearly visible. In the case of the graphene plasmons, the coupling is signaled by a clear anticrossing stemming from the interaction of graphene plasmons with the Higgs mode of the superconductor. In the case of the quantum emitters, the Higgs mode is observable through the Purcell effect. When combining the superconductor, graphene, and the quantum emitters, a number of experimental knobs become available for unveiling and studying the electrodynamics of superconductors.

scholarly journals Eliminating Unwanted Far-Field Excitation in Objective-Type TIRF. Part I. Identifying Sources of Nonevanescent Excitation Light

2014 ◽  
Vol 106 (5) ◽  
pp. 1020-1032 ◽  
Author(s):  
Maia Brunstein ◽  
Maxime Teremetz ◽  
Karine Hérault ◽  
Christophe Tourain ◽  
Martin Oheim
Keyword(s):  
Far Field ◽  
Excitation Light ◽  
Field Excitation ◽  
Objective Type

scholarly journals Far-field excitation of single graphene plasmon cavities with ultracompressed mode volumes

Science ◽  
2020 ◽  
Vol 368 (6496) ◽  
pp. 1219-1223 ◽  
Author(s):  
Itai Epstein ◽  
David Alcaraz ◽  
Zhiqin Huang ◽  
Varun-Varma Pusapati ◽  
Jean-Paul Hugonin ◽  
...  
Keyword(s):  
Nanometer Scale ◽  
Large Momentum ◽  
Far Field ◽  
Low Loss ◽  
Mid Infrared ◽  
Long Wavelength ◽  
Broadband Spectrum ◽  
Field Excitation ◽  
Micrometer Scale ◽  
Coupling Phenomena

Acoustic graphene plasmons are highly confined electromagnetic modes carrying large momentum and low loss in the mid-infrared and terahertz spectra. However, until now they have been restricted to micrometer-scale areas, reducing their confinement potential by several orders of magnitude. Using a graphene-based magnetic resonator, we realized single, nanometer-scale acoustic graphene plasmon cavities, reaching mode volume confinement factors of ~5 × 10–10. Such a cavity acts as a mid-infrared nanoantenna, which is efficiently excited from the far field and is electrically tunable over an extremely large broadband spectrum. Our approach provides a platform for studying ultrastrong-coupling phenomena, such as chemical manipulation via vibrational strong coupling, as well as a path to efficient detectors and sensors operating in this long-wavelength spectral range.

scholarly journals Near- and Far-Field Excitation of Topological Plasmonic Metasurfaces

Photonics ◽  
2020 ◽  
Vol 7 (4) ◽  
pp. 81
Author(s):  
Matthew Proctor ◽  
Xiaofei Xiao ◽  
Richard V. Craster ◽  
Stefan A. Maier ◽  
Vincenzo Giannini ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Honeycomb Lattice ◽  
Far Field ◽  
Two Dimensional ◽  
Edge States ◽  
Source Position ◽  
Magnetic Dipoles ◽  
Classical Wave ◽  
Field Excitation ◽  
Crystalline Symmetry

The breathing honeycomb lattice hosts a topologically non-trivial bulk phase due to the crystalline-symmetry of the system. Pseudospin-dependent edge states, which emerge at the interface between trivial and non-trivial regions, can be used for the directional propagation of energy. Using the plasmonic metasurface as an example system, we probe these states in the near- and far-field using a semi-analytical model. We provide the conditions under which directionality was observed and show that it is source position dependent. By probing with circularly-polarised magnetic dipoles out of the plane, we first characterise modes along the interface in terms of the enhancement of source emissions due to the metasurface. We then excite from the far-field with non-zero orbital angular momentum beams. The position-dependent directionality holds true for all classical wave systems with a breathing honeycomb lattice. Our results show that a metasurface in combination with a chiral two-dimensional material, could be used to guide light effectively on the nanoscale.

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