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We have utilized a novel fabrication concept, i.e., direct laser writing in combination with advanced metallization techniques to realize three-dimensional photonic metamaterials for optical frequencies. Depending on the type of photoresist, we either used chemical vapor deposition of silver or electroplating of gold. Some of the fabricated structures give rise to bi-anisotropy resulting in a cross-coupling of the electric and magnetic fields of an incident light wave. Additionally, we have presented two unit cell designs which show a negative index of refraction at infrared frequencies.

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received the Diploma in physics from the Universität Ulm(Germany) in 2006. Four years later, he received the Ph.D. degreefrom the Karlsruhe Institute of Technology (Germany). He wasengaged in the field of X-Ray dosimetry. His current researchinterests include the fabrication and characterization of 3Dmetamaterials at optical frequencies.

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