Regensburg 2004 – wissenschaftliches Programm

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HL: Halbleiterphysik

HL 15: Photonische Kristalle III

HL 15.7: Vortrag

Dienstag, 9. März 2004, 11:45–12:00, H17

Photonic Band Gap Structures in the 25-60 GHz Range — •Rados Gajic^1,2, Ronald Meisels¹, Fridemar Kuchar¹, Jelena Radovanovic², Alexander Woess³, and Juergen Stampfl⁴ — ¹Insitut fuer Physik, Montanuniversitaet Leoben, Oesterreich — ²Institute of Physics, P:O. Box 68, 11080 Belgrade, Serbia and Montenegro — ³Erich Schmidt Institut fuer Materialwissenschaften, Oesterreichische Akademie der Wissenschaften, Leoben, Oesterreich — ⁴Institut fuer Werkstoffkunde und Materialpruefung, TU Wien, Oesterreich

In this work we present experimental and numerical results on 2D and 3D photonic band gap structures (PBGS) in the frequency range between 25 and 60 GHz (millimeter waves). For the fabrication of the PBGS we used commercially available alumina rods as well as a rapid prototyping method. In the 3D case, the woodpile (layer-by-layer) structure was investigated in order to find the optimal configuration regarding the gap-to-midgap ratio. We also demonstrated the presence of higher in our 2D and 3D PBGS. We compared these experimental findings with numerical calculations based on the transfer matrix method. It was found that a slight change of the cubic fcc structure towards the tetragonal fct geometry yields increased gap-to-midgap ratios (higher than 30 procent). This work is supported by Austrian FWF project No. 15513 and the Serbian Ministry of Science project No. 1469.