Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

HL: Halbleiterphysik

HL 12: Poster I

HL 12.23: Poster

Montag, 8. März 2004, 16:30–19:00, Poster A

Optical superlattices based on surface acoustic waves — •M. M. de Lima, Jr., R. Hey, and P. V. Santos — Paul-Drude-Institut, Berlin

We present a novel concept for the fabrication of dynamic optical superlattices based on the modulation of a planar photonic microresonator by surface acoustic waves (SAWs). The microresonator consists of a λ/4 GaAs cavity layer sandwiched between GaAs/AlAs Bragg reflectors. The optical superlattice is formed by SAW beams, which laterally modulate the cavity optical properties. The strong light field in the cavity layer considerably enhances the acousto-optic interaction, thus leading to high diffraction intensities. We report the observation of stop bands in the light dispersion as wide as 1.4 meV induced by the lateral periodicity imposed by the SAWs. We also demonstrate the formation of two-dimensional superlattices by the interference of orthogonal SAW beams.