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Updated: Jun 11, 2026
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Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
Published on: September 27, 2011
Diabolical point and conical-like diffraction in periodic plasmonic nanostructures
Sung Hyun Nam1, Antoinette J Taylor, Anatoly Efimov
1Center for Integrated Nanotechnologies, Materials Physics & Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA. snam@lanl.gov
Optics Express
|July 1, 2010
Summary
We discovered a unique singularity in waveguide arrays, leading to unusual light diffraction. This finding offers new ways to control light at the nanoscale using plasmonics.
Area of Science:
- Photonics and Plasmonics
- Condensed Matter Physics
- Electromagnetism
Background:
- Periodic structures like metal-dielectric waveguide arrays are crucial for controlling light propagation.
- Understanding wave phenomena in these structured materials is key to developing advanced optical devices.
- Singularities in k-space can lead to unique optical responses and phenomena.
Purpose of the Study:
- To investigate the formation of a singular (diabolical) point in k-space within a periodic metal-dielectric waveguide array.
- To analyze the diffraction anomalies and propagation dynamics associated with this singularity.
- To explore the potential of these phenomena for nanoscale light manipulation.
Main Methods:
- Numerical simulations were employed to model the waveguide array and analyze wave propagation.
- The formation of the singular point was studied by examining the balance between normal and anomalous coupling.
- Diffraction patterns were analyzed, focusing on anomalies near the singular point and their evolution with band deformation.
Main Results:
- A singular (diabolical) point in k-space was successfully formed in the metal-dielectric waveguide array.
- A strong diffraction anomaly, resembling conical diffraction, was observed near the singular point.
- The evolution of the diffraction pattern was demonstrated as the band structure deformed.
Conclusions:
- The formation of a diabolical point in k-space is achievable in periodic waveguide arrays.
- This singularity induces significant diffraction anomalies and unique propagation dynamics for surface plasmon polaritons.
- The observed phenomena offer a novel platform for nanoscale light manipulation.
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