Photonic lock based high bandwidth photodetector

A method for forming a photodetector device, the method comprising:

• forming a light absorption region and first reflective region and a second reflective region over a substrate, wherein the first and second reflective regions are formed on substantially the same planar surface;
• and
• forming a light absorption region between the first and second reflective regions so as to absorb light passed through the first reflective region and reflected between the first and second reflective regions,
• wherein the first reflective region has a reflectivity that causes an amount of light energy that escapes from the first reflective region, after the light being reflected by the second reflective region, to be substantially zero.

A method for forming a photodetector device, the method comprising:

• forming a light absorption region;
• and
• forming a first and a second reflective regions;
• wherein the light absorption region is positioned between the first and second reflective regions so as to absorb light passed through the first reflective region and reflected between the first and second reflective regions, and
• wherein the first reflective region has a reflectivity that causes an amount of light energy that escapes from the first reflective region, after the light being reflected by the second reflective region, to be substantially zero.

An optoelectronic system for sensing optical signals, the system comprising:

• a microcontroller;
• a memory;
• and
• an optoelectronic apparatus including a photodetector that includes:
• a first reflective region;
• a second reflective region;
• and
• a light absorption region positioned between the first and second reflective regions so as to absorb light passed through the first reflective region and reflected between the first and second reflective regions,
• wherein the first reflective region has a reflectivity that causes an amount of light energy that escapes from the first reflective region, after the light being reflected by the second reflective region, to be substantially zero,
• wherein (a) the first reflective region's reflectivity, (b) a reflectivity of the second reflection region, and (c) an attenuation coefficient of the light absorption region are collectively configured such that, when the light enters the light absorption region and reflects between the first and second reflective regions, the light resonates in the light absorption region,
• wherein the first reflective region's reflectivity is configured to be substantially equal to a one-circulation attenuation coefficient of the light absorption region, and
• wherein the one-circulation attenuation coefficient indicates a ratio of remainder light energy over entrance light energy in one circulation.