Negative Refraction in Ferromagnet-Superconductor Superlattices
- 9 December 2005
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 95 (24), 247009
- https://doi.org/10.1103/physrevlett.95.247009
Abstract
Negative refraction, which reverses many fundamental aspects of classical optics, can be obtained in systems with negative magnetic permeability and negative dielectric permittivity. This Letter documents an experimental realization of negative refraction at millimeter waves, finite magnetic fields, and cryogenic temperatures utilizing a multilayer stack of ferromagnetic and superconducting thin films. In the present case the superconducting layers provide negative permittivity while negative permeability is achieved via ferromagnetic layers for frequencies and magnetic fields close to the ferromagnetic resonance. In these superlattices the refractive index can be switched between positive and negative regions using external magnetic field as tuning parameter.
This publication has 29 references indexed in Scilit:
- A new condition to identify isotropic dielectric‐magnetic materials displaying negative phase velocityMicrowave and Optical Technology Letters, 2004
- Negative refraction by photonic crystalsNature, 2003
- Experimental Observations of a Left-Handed Material That Obeys Snell’s LawPhysical Review Letters, 2003
- Refraction in Media with a Negative Refractive IndexPhysical Review Letters, 2003
- Experimental Verification and Simulation of Negative Index of Refraction Using Snell’s LawPhysical Review Letters, 2003
- The negative index of refraction demystifiedEuropean Journal of Physics, 2002
- Experimental Verification of a Negative Index of RefractionScience, 2001
- Negative Refraction Makes a Perfect LensPhysical Review Letters, 2000
- Composite Medium with Simultaneously Negative Permeability and PermittivityPhysical Review Letters, 2000
- THE ELECTRODYNAMICS OF SUBSTANCES WITH SIMULTANEOUSLY NEGATIVE VALUES OF $\epsilon$ AND μSoviet Physics Uspekhi, 1968