Post-fabrication photonic performance tuning

A system for designing a photonic device comprising:

• a data processing apparatus including one or more processors and a computer-readable storage device coupled to the one or more processors and having instructions stored thereon which, when executed by the one or more processors, cause the one or more processors to perform operations, the operations comprising:
• receiving, by a data processing apparatus comprising a computational inverse design tool, an initial photonic device configuration of the photonic device comprising a plurality of coupling structures and a plurality of photonic components;
• receiving, by the computational inverse design tool, while modifying the plurality of coupling structures, information about a measured amount of light coupling between a first photonic component and a second photonic component of the plurality of photonic components, wherein the amount of light coupling between the first photonic component and the second photonic component depends upon coupling structures that are located between the first photonic component and the second photonic component;
• receiving, by the computational inverse design tool, information about a target amount of light coupling between the first photonic component and the second photonic component;
• and
• determining in real-time with receiving the information about the measured amount of light coupling by the computational inverse design tool, further modifications to the coupling structures that are located between the first photonic component and the second photonic component to reduce a difference between the measured amount of light coupling and the target amount of light coupling, comprising:
• defining a loss function within a simulation space composed of a plurality of voxels, the simulation space encompassing the photonic device including the coupling structures and the first photonic component and the second photonic component, the loss function corresponding to a target light coupling profile between the first photonic component and the second photonic component via evanescent coupling through the coupling structures that are located between the first photonic component and the second photonic component, and wherein the target light coupling profile comprises a relationship between the coupling structures that are located between the first photonic component and the second photonic component and an amount of evanescent coupling of an electromagnetic field between the first photonic component to the second photonic component via the coupling structures;
• determining values for at least one structural parameter and/or at least one functional parameter to calculate a loss determined according to the loss function, wherein the at least one structural or functional parameter corresponds to a structure of the photonic device;
• and
• defining a final structure of the photonic device based on the values for the one or more structure and/or functional parameters;
• wherein the further modifications to the coupling structures comprise determining, by the computational inverse design tool, a particular coupling structure of the coupling structures located between the first photonic component and second photonic component to remove.

One or more non-transitory computer-readable storage media coupled to one or more processors and having instructions stored thereon which, when executed by the one or more processors, cause the one or more processors to perform operations, the operations comprising:

• receiving, by a data processing apparatus comprising a computational inverse design tool, an initial photonic device configuration of the photonic device comprising a plurality of coupling structures and a plurality of photonic components;
• receiving, by the computational inverse design tool, while modifying the plurality of coupling structures, information about a measured amount of light coupling between a first photonic component and a second photonic component of the plurality of photonic components, wherein the amount of light coupling between the first photonic component and the second photonic component depends upon coupling structures that are located between the first photonic component and the second photonic component;
• receiving, by the computational inverse design tool, information about a target amount of light coupling between the first photonic component and the second photonic component;
• and
• determining in real-time with receiving the information about the measured amount of light coupling by the computational inverse design tool, further modifications to the coupling structures that are located between the first photonic component and the second photonic component to reduce a difference between the measured amount of light coupling and the target amount of light coupling, comprising:
• defining a loss function within a simulation space composed of a plurality of voxels, the simulation space encompassing the photonic device including the coupling structures and the first photonic component and the second photonic component, the loss function corresponding to a target light coupling profile between the first photonic component and the second photonic component via evanescent coupling through the coupling structures that are located between the first photonic component and the second photonic component, and wherein the target light coupling profile comprises a relationship between the coupling structures that are located between the first photonic component and the second photonic component and an amount of evanescent coupling of an electromagnetic field between the first photonic component to the second photonic component via the coupling structures;
• determining values for at least one structural parameter and/or at least one functional parameter to calculate a loss determined according to the loss function, wherein the at least one structural or functional parameter corresponds to a structure of the photonic device;
• and
• defining a final structure of the photonic device based on the values for the one or more structure and/or functional parameters;
• wherein the further modifications to the coupling structures comprise determining, by the computational inverse design tool, a particular coupling structure of the coupling structures located between the first photonic component and second photonic component to remove.