Optical device for controlling light

Optical device for controlling light comprising

• a substrate, wherein a surface of the substrate constitutes a boundary surface and wherein a region of the substrate contacting the boundary surface constitutes a border region,
• a waveguide formed within the substrate for guiding a light beam, and
• an optical structure,
• wherein the waveguide bends towards the boundary surface of the substrate for directing the light beam at the optical structure, wherein the border region is arranged at least partially in an optical path between the waveguide and the optical structure such that a light beam to be emitted from the waveguide towards the optical structure passes through the border region,
• wherein there is provided for a contact structure contacting the border region at the boundary surface, wherein the contact structure has a refractive index, which is lower than the refractive index of the substrate in the border region,
• wherein the optical device further comprises a primary waveguide formed within the substrate for receiving a light beam from an external light source, wherein the primary waveguide is connected or coupled to the waveguide.

Optical device for controlling light comprising

• a substrate, wherein a surface of the substrate constitutes a boundary surface and wherein a region of the substrate contacting the boundary surface constitutes a border region,
• a waveguide formed within the substrate for guiding a light beam, and
• an optical structure,
• wherein the waveguide bends towards the boundary surface of the substrate for directing the light beam at the optical structure, wherein the border region is arranged at least partially in an optical path between the waveguide and the optical structure such that a light beam to be emitted from the waveguide towards the optical structure passes through the border region,
• wherein there is provided for a contact structure contacting the border region at the boundary surface, wherein the contact structure has a refractive index, which is lower than the refractive index of the substrate in the border region,
• wherein a refractive index difference of the refractive index of the contact structure and the refractive index of the substrate in the border region is between 0.0001 and 0.1.