Controlling metamaterial resonances with light

Journal Article · Sun Aug 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.023810· OSTI ID:21456946

Chakrabarti, Sangeeta; Ramakrishna, S Anantha; Wanare, Harshawardhan ^[1]

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1. Department of Physics, Indian Institute of Technology, Kanpur 208016 (India)

We investigate the use of coherent optical fields as a means of dynamically controlling the resonant behavior of a variety of composite metamaterials, wherein the metamaterial structures are embedded in a dispersive dielectric medium. Control and switching are implemented by coherently driving the resonant permittivity of the embedding medium with applied optical radiation. The effect of embedding split ring resonators in a frequency-dispersive medium with Lorentz-like dispersion or with dispersion engineered by electromagnetically induced transparency (EIT) is manifested in the splitting of the negative-permeability band, the modified (frequency-dependent) filling fractions, and the dissipation factors. The modified material parameters are strongly linked to the resonant frequencies of the medium, and for an embedding medium exhibiting EIT also to the strength and detuning of the control field. The robustness of control against the deleterious influence of dissipation associated with the metallic structures as well as the inhomogeneous broadening due to structural imperfections is demonstrated. Studies on plasmonic metamaterials that consist of metallic nanorods arranged in loops and exhibit a collective magnetic response at optical frequencies are presented. Control and switching in this class of plasmonic nanorod metamaterials is shown to be possible, for example, by embedding these arrays in a Raman-active liquid like CS{sub 2} and utilizing the inverse Raman effect.

• OSTI ID: 21456946
• Journal Information: Physical Review. A, Vol. 82, Issue 2; Other Information: DOI: 10.1103/PhysRevA.82.023810; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
CARBON SULFIDES
CONTROL
DIELECTRIC MATERIALS
DISSIPATION FACTOR
FREQUENCY DEPENDENCE
LIQUIDS
NANOSTRUCTURES
OPACITY
PERMITTIVITY
PLASMONS
RAMAN EFFECT
RESONANCE
RESONATORS
VISIBLE RADIATION
CARBON COMPOUNDS
CHALCOGENIDES
DIELECTRIC PROPERTIES
DIMENSIONLESS NUMBERS
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
EQUIPMENT
FLUIDS
MATERIALS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
QUASI PARTICLES
RADIATIONS
SULFIDES
SULFUR COMPOUNDS