Photodetectors with controllable resonant enhancement

A resonant cavity photodetector structure device having photodetection and filtering capabilities, comprising:

• a resonator region comprising a resonator photonic element wherein the resonator photonic element performs resonance wavelength-based filtering to provide the filtering capabilities of the resonator photodetector device;
• an absorption region adjacent to the resonator region and comprising photodiode photonic elements, wherein the photodiode photonic elements perform optical enemy detection to provide the photodetection capabilities, wherein the photodiode photonic elements comprise an avalanche photodiode (APD), wherein the APD is a separate-absorption-charge-and-multiplication (SACM) APD and a separate section of the SACM APD is positioned on a section of a ring waveguide;
• and
• a coupling distance between the resonator region and the absorption region, wherein the coupling distance is selectively adjusted to control a coupling strength between an optical mode associated with the resonator region and the absorption region and correspondingly control a quality factor (Q-factor) of the filtering capabilities.

A resonant cavity photodetector structure device having photodetection and filtering capabilities, comprising:

• a resonator region comprising a resonator photonic element, wherein the resonator photonic elements perform resonance wavelength-based filtering to provide the filtering capabilities of the resonator photodetector device, wherein the resonator photonic element comprises a microring resonator further comprising a ring waveguide evanescently coupled to a bus waveguide;
• an absorption region adjacent to the resonator region and comprising an avalanche photodiode (APD) performing the photodetection capabilities, wherein the absorption region comprising the APD is positioned outside of an area bordered by a diameter of the ring waveguide;
• and
• a coupling distance between the resonator region and the absorption region, wherein the coupling distance is selectively adjusted to control a coupling strength between an optical mode associated with the resonator region and the absorption region and correspondingly control a quality factor (Q-factor) of the filtering capabilities.