Patent ID: 6990259
Filing Date: 2006-01-24
Classification: B82Y,G01J,G01N,G02B

Abstract:
1. A photonic crystal biosensor comprising: an array of two-dimensional unit cells, each of said unit cells having a substrate and a multitude of raised portions arranged in a regular repeating pattern wherein said raised portions are separated from each other by adjacent void portions, said raised portions made from a material having a relatively high index of refraction n1 greater than that of water; wherein each of said unit cells further comprises a defect wherein the regular repeating pattern of said raised portion separated by adjacent voids is modified such that at the defect said material having a relatively high index of refraction n1 occupies the space of one or more of the voids; wherein a localized maximum of electromagnetic field intensity is produced in the region of said defect in response to incident light on said photonic crystal at a resonant frequency; and wherein, during use, a fluid containing a sample to be tested is placed on said photonic crystal and contained in said void portions.