Spectrally filtered photodiode pair
AssigneeUniversity of Massachusetts
InventorGuangyu Xu
Life of this patent
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Abstract
A spectrally filtered photodiode pair includes a substrate having a first photodiode and a second photodiode, wherein the first photodiode is positioned adjacent to the second photodiode. The spectrally filtered photodiode pair further includes a first spectral filter positioned over the first photodiode and a second spectral filter positioned over the second photodiode. The first and second spectral filters comprise particular absorbing dye compositions described herein, selected to filter preselected wavelengths of light. The spectrally filtered photodiode pair can be useful in sensors, particularly when rapid and low-concentration detection is needed.
Claims18
A spectrally filtered photodiode pair comprising
- a substrate having a first photodiode and a second photodiode disposed thereon, wherein the first photodiode is positioned adjacent to the second photodiode;
- a first spectral filter positioned over the first photodiode;
- and
- a second spectral filter positioned over the second photodiode;
- wherein the first spectral filter comprises
- a first absorbing dye composition capable of
- absorbing light at a first wavelength,
- absorbing light at a second wavelength, and
- passing light at a third wavelength that is different from the first and second wavelengths;
- and
- wherein the second spectral filter comprises
- a second absorbing dye composition capable of
- absorbing light at the first wavelength,
- passing light at the second wavelength;
- and
- absorbing light at the third wavelength.
Dependencies are inferred from the claim text.