@inproceedingsKlein_Enkrich_Wegener_Förstner_Moloney_Hoyer_Stroucken_Meier_Koch_Linden_2006, title=Optical experiments on second-harmonic generation from metamaterials consisting of split-ring resonators, DOI=10.1109/cleo.2006.4629006, number=QTh, booktitle=2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference, publisher=IEEE, author=Klein, M. W. and Enkrich, C. and Wegener, M. and Förstner, Jens and Moloney, J. V. and Hoyer, W. and Stroucken, T. and Meier, Torsten and Koch, S. W. and Linden, S., year=2006