Regensburg 2000 – wissenschaftliches Programm
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HL: Halbleiterphysik
HL 8: Photonik
HL 8.6: Vortrag
Montag, 27. März 2000, 17:45–18:00, H17
Photonic structures with several complete photonic bandgaps in the visible — •Moroz Alexander1,2 and van der Lem Han1 — 1FOM-Instituut voor Atoom- en Molecuulfysica, Kruislaan 407, 1098 SJ Amsterdam, The Netherlands — 2I. Institut für Theoretische Physik, Universität Hamburg, 20355 Hamburg, Germany
Till recently, no two- (2D) and three-dimensional (3D) photonic
structures have been known to yield a practical complete photonic
bandgap (CPBG) for refractive indices available below infrared
wavelengths. The key to avoid restrictions on the refractive index
is to use the scatterers made out of material having a
Drude-like behaviour of the dielectric function,
and, to tune lattice spacing appropriately to a characteristic
plasma wavelength λp.
In the frequency region
0.6ωp ≤ ω ≤ 1.1 ωp, with ωp
being the plasma frequency, where the material bulk
absorption is assumed to be small,
2D and 3D photonic structures made of such scatterers are shown to exhibit
several CPBG’s with the relative gap width gw
(gap width to the midgap frequency ratio) up to 15% in 2D and
10% in 3D, even if the host refractive index nh=1.
Using different coatings and supporting liquids, the width and midgap
frequency of a CPBG can be tuned considerably.
Reference: A. Moroz, Phys. Rev. Lett. (in print);
Europhys. Lett. (submitted);
H. van der Lem and A. Moroz, Appl. Phys. Lett. (submitted).