This week the most interesting application comes from Canon. US20080231859 application is supposed to solve most of the small pixel problems, such as reduced sensitivity and low SNR. It achieves the improvement by changing a Bayer RGB filter for a "spectroscopic element formed by means of an optical microresonator".
The bad thing is that I was unable to understand how these resonating cavities made and how they manage to effectively generate photocharge in smaller than wavelength pixels. I've read the description back and forth and I'm still puzzled. Anyway, the promise of this idea is great and if Canon knows how to make it, this would be a huge boost in image quality of small pixels.
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