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Scattering Forces within a Left-Handed Photonic Crystal
Angeleene S Ang1, Sergey V Sukhov1,2,3, Aristide Dogariu2
1The International Research Centre for Nanophotonics and Metamaterials, ITMO University, St Petersburg, Russia.
Optical forces from electromagnetic waves in left-handed metamaterials were thought to be negative. Numerical simulations show that positive radiation pressure is maintained in left-handed photonic crystals, despite reversed phase propagation.
Area of Science:
- Physics
- Materials Science
- Optics
Background:
- Electromagnetic waves exert optical forces via radiation pressure.
- Left-handed metamaterials exhibit unique electromagnetic properties, including negative refraction.
- Previous hypotheses suggested negative radiation pressure within these materials.
Purpose of the Study:
- To numerically investigate optical forces within left-handed photonic crystals.
- To examine the behavior of radiation pressure under negative refraction and reversed phase propagation.
Main Methods:
- Numerical simulations of optical forces.
- Analysis of electromagnetic wave propagation in left-handed photonic crystals.
Main Results:
- Left-handed photonic crystals exhibit negative refraction and reversed phase propagation.
- Positive radiation pressure is consistently observed within these photonic crystals.
- The direction of optical force may not align with the energy flow.
Conclusions:
- The hypothesis of negative radiation pressure in left-handed metamaterials is not supported by these findings.
- Photonic crystals maintain positive radiation pressure even with exotic wave propagation characteristics.
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