Berlin 2008 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 5: Symposium Nanostructured Photonic Materials

HL 5.1: Hauptvortrag

Montag, 25. Februar 2008, 15:00–15:30, ER 270

FDTD method in nanophotonics: 2D and 3D photonic crystals and lasing — •Andrei Lavrinenko — Building 345V, Oersted Plads

2D photonic crystals are treated in verious regimes: transmission bands, TE-TM conversion and slow light regime. The Si inverted-opals based 3D photonic crystals are explored as hosts for effective air-channel waveguides served as parts of photonic circuits. The influence of imperfections on the existence of photonic band gaps as the principle mechanism for waveguiding in such channels is studied. High appropriateness and precision of employed numerical method * 3D FDTD * is validated in the direct comparison with forward scattering experiments in thin opal films. A process of the seeding two coupled defects in photonic crystals filled by gain medium with a symmetric or antisymmetric pulse is shown to act as an ultrafast switchable mechanism for lasing. The generic idea is valid for different photonic applications.