Advances in Radio Science www.adv-radio-sci.net 1684-9965 1684-9973 4 Kleinheubacher Berichte 2005 2006 10.5194/ars-4-17-2006 http://www.adv-radio-sci.net/4/17/2006/ http://www.adv-radio-sci.net/4/17/2006/ars-4-17-2006.html http://www.adv-radio-sci.net/4/17/2006/ars-4-17-2006.pdf 17 19 2006-09-04 Photonic crystals as host material for a new generation of microwave components F. Daschner fd@tf.uni-kiel.de R. Knöchel E. Foca J. Carstensen V. V. Sergentu H. Föll I. M. Tiginyanu Microwave Laboratory, Christian-Albrechts-University of Kiel, Kaiserstr. 2, 24143 Kiel, Germany Chair for General Materials Science, Christian-Albrechts-University of Kiel, Kaiserstr. 2, 24143 Kiel, Germany Institute of Applied Physics, Academy of Sciences of Moldova, 5 Academy str., 2028 Chisinau, Moldova In order to verify simulations of a concave lens based upon a photonic crystal, it was scaled and built for the application in the microwave range. Its field distribution was measured between 5.5 and 12 GHz. Due to the effective refractive index smaller than 1, focusing points were found in spite of the concave shape. The survey of the field distributions at the investigated frequencies leads to other possible applications of photonic crystals in the microwave and millimetre wave region, like beam-splitter and prism. Joannopoulos,~J D., Meade,~R D., and Winn,~J N.: Photonic Crystals: Modeling the Flow of Light, Princenton Univ. Press, Princenton, NJ, 1995. Notomi,~M.: Theory of light propagation in strongly modulated photonic crystals: Refractionlike behavior in the vicinity of the photonic band gap, Phys. Rev. 62, 10 696–10 705, 2000. Felbacq,~D., Tayeb,~G., and Maystre,~D.: Scattering by a random set of parallel cylinders, J. Opt. Soc. Am., 11, 2526, 1994. Foca,~E., Föll,~H., Daschner,~F., Sergentu,~V V., Carstensen,~J., Knöchel,~R., and Tiginyanu,~I M.: Efficient focusing with an Ultra-Low Effective-Index Lens based on Photonic Crystals, Proc. of the MRS Spring Meeting 2005, Symposium D, 2005a. Foca,~E., Föll,~H., Daschner,~F., Sergentu,~V V., Carstensen,~J., Frey,~S., Knöchel,~R., and Tiginyanu,~I M.: Efficient focusing with a concave lens based on a photonic crystal with an unusual effective index of refraction, Phys. Stat. Sol., 202, 35, 2005b. Foca,~E., Föll,~H., Carstensen,~J., Sergentu,~V V., Tiginyanu,~I M., Knöchel,~R., and Daschner,~F.: Strongly frequency dependent focusing efficiency of a concave lens based on two-dimensional photonic crystals, Appl. Phys. Lett., 88, 011102, 2006. Pendry,~J B.: Negative refraction makes a perfect lens, Phys. Rev. Lett., 85, 3966–3968, 2000.