Metamaterials

Department for Integrated Sensor Systems

Metamaterials

DISS focusses its research on so-called Perfect Metamaterial Absorber (PMA) which are applied in various sensor types. It uses numerical models in COMSOL and effective medium calculations to design appropriate composite materials and structures which are fabricated by thin film and lithographic techniques.

Metamaterials are artificial materials consisting of periodic or non-periodic unit cell structures which exhibit unusual electromagnetic properties, not readily found in nature. Metamaterials derive their properties from both the compositional properties of the base materials and their exactingly-designed unit cell structures. The incorporated structural elements are of sub-wavelength sizes.

A metamaterial absorber utilizes the effective medium design of metamaterials and the loss components of electric permittivity and magnetic permeability to create a material that has a high ratio of electromagnetic radiation absorption. PMA is a near 100% absorber. The imaginary loss terms can be engineered to create high attenuation and correspondingly large absorption. By independently manipulating resonances in ε and µ, it is possible to absorb both the incident electric and magnetic field. Additionally, a metamaterial can be impedance-matched to free space by engineering its permittivity and permeability, minimizing reflectivity. Thus, it becomes a highly capable absorber.

Contact: Hubert Brückl

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