Abstract
Germanium-doped multi-layer waveguides containing a silicon oxy-nitride layer as a charge trapper are thermally poled in an air environment. Compared to the waveguides without the trapping layer, the induced linear electro-optic coefficient increases more than 20%. A comparable rise in the internal field is found. Our results demonstrate an optimization of the optical nonlinearity by shaping the built-in internal field with the charge-trapping layer.
Original language | English |
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Journal | Applied Physics B |
Volume | 78 |
Issue number | 3-4 |
Pages (from-to) | 371-375 |
ISSN | 0946-2171 |
Publication status | Published - 2004 |