Hamburg 2001 – wissenschaftliches Programm

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HL: Halbleiterphysik

HL 7: Poster I

HL 7.25: Poster

Montag, 26. März 2001, 10:30–19:00, Rang S\ 3

A study of the influence of pore shapes on the dispersion behaviour of 2D Si-based photonic crystals — •Reinald Hillebrand¹, Wolfram Hergert², and Jörg Schilling¹ — ¹MPI of Microstructure Physics Weinberg 2, D-06120 Halle, Germany — ²Department of Physics, Martin-Luther University Halle, Germany

Photonic crystals (PCs), fabricated by electro-chemical pore etching, are of increasing interest for applications in the IR (1.5 µm, C-band of telecommunication).
Because of the high aspect ratio of the pores (depth/diameter > 100) the hexagonal crystal lattices can be theoretically described as two-dimensional. Band structures (dispersion) of TM- and TE-polarization are discussed for varying pore sizes and shapes (circles, ellipses, rectangles) with respect to the maximum band gaps attainable. The poster discusses theoretical results of band structure calculations (plane wave approach, [1]), as well as transmittance and reflectivity computations in relation to experimental measurements [2].
[1] R. Hillebrand, W. Hergert, Solid State Comm. 115, 227-232 (2000). [2] J. Schilling et al., E-MRS Strasbourg, Sympos. G-I.3, Optics Mate- rials, in press (2000).