Patent ID: 6384912
Filing Date: 2002-05-07
Classification: G01N

Abstract:
A device for analyzing a sample, said device comprising:a transparent carrier having a surface; a wave-guiding layer located on the surface of said transparent carrier having at least one first diffractive element operable to couple excitation radiation into said wave-guiding layer; and a layer having a support surface and at least one cavity, the support surface of said layer being located on said wave-guiding layer and fully covering said at least one first diffractive element such that said wave-guiding layer is located in between said transparent carrier and said layer, wherein at least the support surface of said layer is transparent to the excitation radiation and an evanescent radiation at least to a penetration depth of an evanescent field and the at least one cavity has a depth corresponding at least to the penetration depth of the evanescent field.