Omega Optics of Austin, Texas, has received US Patent No. 8,580,200, "Method for label-free multiple analyte sensing, biosensing and diagnostic assay." The patent claims an on-chip integrated microarray device that enables detection and identification of multiple species to be performed simultaneously using optical techniques leading to a high throughput device for chemical sensing, biosensing and medical diagnostics. According to the patent, the array consists of photonic crystal microcavities patterned along a single photonic crystal waveguide.

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