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Plasmon-enhanced near-field chirality in twisted van der Waals heterostructures
Plasmon-enhanced near-field chirality in twisted van der Waals heterostructures
- Publication Year :
- 2020
-
Abstract
- It is shown that chiral plasmons, characterized by a longitudinal magnetic moment accompanying the longitudinal charge plasmon, lead to electromagnetic near-fields that are also chiral. For twisted bilayer graphene, we estimate that the near field chirality of screened plasmons can be several orders of magnitude larger than that of the related circularly polarized light. The chirality also manifests itself in a deflection angle that is formed between the direction of the plasmon propagation and its Poynting vector. Twisted van der Waals heterostructures might thus provide a novel platform to promote enantiomer-selective physio-chemical processes in chiral molecules without the application of a magnetic field or external nano-patterning that break time-reversal, mirror plane or inversion symmetry, respectively.<br />33 pages, 5 figures
- Subjects :
- Physics
Magnetic moment
Condensed matter physics
Condensed Matter - Mesoscale and Nanoscale Physics
Mechanical Engineering
FOS: Physical sciences
Physics::Optics
Bioengineering
Near and far field
02 engineering and technology
General Chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
Magnetic field
Poynting vector
Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
General Materials Science
0210 nano-technology
Chirality (chemistry)
Bilayer graphene
Plasmon
Circular polarization
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....f6ebc549b1d38be744a5ccfd7106df4a