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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
Topological transitions in metamaterials
Harish N S Krishnamoorthy1, Zubin Jacob, Evgenii Narimanov
1Department of Physics, Queens College, City University of New York (CUNY), Flushing, NY 11367, USA.
Science (New York, N.Y.)
|April 14, 2012
Summary
Researchers discovered an optical topological transition in metamaterials. This transition dramatically increases photon density, enhancing light-matter interactions and spontaneous emission rates.
Area of Science:
- Optics and Photonics
- Materials Science
- Condensed Matter Physics
Background:
- Light-matter interactions are fundamental to many scientific and technological fields.
- Controlling these interactions often relies on engineering the photonic environment.
- Metamaterials offer unique possibilities for manipulating light due to their artificial nanostructure.
Purpose of the Study:
- To investigate an optical topological transition in anisotropic metamaterials.
- To demonstrate how this transition can enhance light-matter interactions.
- To explore the potential of topological transitions for controlling spontaneous emission.
Main Methods:
- Fabrication of strongly anisotropic metamaterials using artificial nanostructuring.
- Theoretical analysis of the topology of iso-frequency surfaces.
- Experimental measurement of spontaneous emission rates near the metamaterial.
Main Results:
- An optical topological transition was observed, changing the iso-frequency surface from a closed ellipsoid to an open hyperboloid.
- This topological transition led to a significant increase in the photon density of states.
- Increased rates of spontaneous emission were measured for emitters near the metamaterial.
Conclusions:
- Altering the topology of the iso-frequency surface in metamaterials provides a novel method for controlling light-matter interactions.
- This approach offers a new pathway for enhancing phenomena like spontaneous emission.
- The findings open avenues for designing advanced optical devices and controlling quantum phenomena.
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