Permanent Bi-directional Wavelength Shifting of Photonic Microresonators via Laser Trimming

Mitigating tolerances of integrated photonic devices on wafer-scale remains challenging. We demonstrate the permanent bi-directional post-fabrication reconfiguration of deposited silicon photonic circuit components via localized laser irradiation. Microresonators are utilized to investigate the reversibility of spectral shifts and to evaluate such effects on quality factor.