Dual color detection systems and methods

A method for fabricating an imaging device, the method comprising:

• forming a first layer having a first conductivity type;
• forming a second layer on the first layer, wherein the second layer has a second conductivity type different from the first conductivity type;
• forming a third layer on the second layer, wherein the third layer has the first conductivity type;
• forming a first set of pixels of the imaging device, wherein each pixel of the first set of pixels is formed by removing a respective portion of each of the first layer, the second layer, and the third layer, wherein the first set of pixels is associated with detection of a first waveband of electromagnetic radiation;
• forming a second set of pixels of the imaging device, wherein each pixel of the second set of pixels is formed by removing a respective portion of the first layer, wherein the second set of pixels is associated with detection of a second waveband of the electromagnetic radiation, and wherein at least a portion of the second waveband does not overlap the first waveband;
• forming a first ground contact on the first layer;
• and
• forming a second ground contact on the second layer.

A method for operating an imaging device, the method comprising:

• applying, by a bias circuit of the imaging device, a first voltage between a first pixel of the imaging device and a first ground contact;
• applying, by the bias circuit, a second voltage between a second pixel of the imaging device and a second ground contact, wherein the second pixel comprises a first portion of a first layer, a second layer disposed on the first portion, and a third layer disposed on the second layer, wherein the first and third layers have a first conductivity type, wherein the second layer has a second conductivity type different from the first conductivity type, wherein the first ground contact is disposed on and in contact with the first layer, and wherein the second ground contact is disposed on and in contact with the second layer;
• detecting, by the first pixel, first image data associated with a first waveband of electromagnetic radiation;
• and
• detecting, by the second pixel, second image data associated with a second waveband of the electromagnetic radiation, wherein at least a portion of the second waveband does not overlap the first waveband.