Dresden 2009 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 43: Photonic crystals I

HL 43.1: Talk

Thursday, March 26, 2009, 09:30–09:45, POT 151

Electro-optical modulator in a polymer- infiltrated silicon slotted photonic crystal waveguide heterostructure resonator — •Jan Hendrik Wülbern, Alexander Petrov, and Manfred Eich — Institut für Optische und Elektronische Materialen, Technische Universität Hamburg-Harburg, 21073 Hamburg

We present a novel concept of a compact, ultra fast electro-optic modulator, based on photonic crystal resonator structures that can be realized in two dimensional photonic crystal slabs of silicon as core material employing a nonlinear optical polymer as infiltration and cladding material. The novel concept is to combine a photonic crystal heterostructure cavity with a slotted defect waveguide. The photonic crystal lattice can be used as a distributed electrode for the application of a modulation signal. An electrical contact is hence provided while the optical wave is kept isolated from the lossy metal electrodes. Thereby, well known disadvantages of segmented electrode designs such as excessive scattering are avoided. The optical field enhancement in the slotted region increases the nonlinear interaction with an external electric field resulting in an envisaged switching voltage of less than 1 V at modulation speeds up to 100 GHz.