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The sensitivity of surface plasmon resonance (SPR) biosensor technology for detection of bacterial analytes is investigated as a function of (a) sample flow conditions and (b) depth of probing electromagnetic field. These parameters are extremely important as such analytes exhibit large (of around micrometer) size which significantly hinders their diffusion-driven transfer from a liquid sample to...
We report a new approach for the investigation of thin films and interfaces based on the spectroscopy of coupled long range surface plasmons (cLRSPs). These modes are supported by a symmetrical layer structure with two metallic waveguides along which long range surface plasmons (LRSPs) propagate. For sufficiently small gap between the metallic waveguides, coupling between these LRSPs is established...
A long range surface plasmon (LRSP) is an electromagnetic wave propagating along a thin metal film with an order of magnitude lower damping than conventional surface plasmon (SP) waves. Thus, the excitation of LRSP is associated with a narrower resonance and it provides larger enhancement of intensity of the electromagnetic field. In surface plasmon resonance (SPR) biosensors, these features allow...
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