Optical waveguide and devices
AssigneeOxford University Innovation Limited
InventorsHarish Bhaskaran, Wen Zhou, Xuan Li
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Abstract
An optical waveguide (100) is disclosed, for guiding light in a photonic circuit comprising a layer of phase change material (101) for modulating the phase of the guided light. The phase change material (101) is switchable between at least a stable crystalline state and a stable amorphous state each with different refractive indexes. The phase change material (101) exhibits an extinction coefficient of less than 0.1 in both states for wavelengths greater than 1000 nm.
Claims19
An optical waveguide for guiding light in a photonic circuit comprising a layer of phase change material for modulating the phase of the guided light,
- wherein the phase change material is switchable between at least a stable crystalline state and a stable amorphous state each with different refractive indexes, and the phase change material exhibits an extinction coefficient of less than 0.1 in both states for wavelengths greater than 1000 nm, wherein the phase change material is formed of or comprises a chalcogenide comprising antimony selected from:
- antimonide trisulphide (Sb2S3) and antimonide triselenium (Sb2Se3).
Dependencies are inferred from the claim text.