Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"refractive index sensitivity"”.
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Long-Period Gratings as Immuno-Diagnostic biosensors
… presents a novel biosensor which utilizes the refractive index sensitivity of a fiber optic long-period grating. The long period grating couples light from the forward propagating guided core mode of a single-mode fiber into discrete circularly symmetric cladding modes. Due to imperfections in …
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Optical fibre surface plasmon resonance sensors based on a metallic array of sub-wavelength apertures
… fibre. Factors contributing to the liquid refractive index sensitivity are explored systematically through simulation, theory, and experiment. The optical fibre sensor (OFS) is a novel sensing device based on surface plasmon resonance technology and metallic nanostructure materials. The …
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Plasmonic devices for manipulating light at the nanoscale: slow-light waveguides and compact couplers
… an order of magnitude enhancement in the refractive index sensitivity, and therefore in the minimum detectable refractive index change, compared to a MZI sensor using a conventional MDM waveguide. I also introduce compact wavelength-scale slit-based structures for coupling free space light …
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Numerical Analysis of Optically-induced Long-period Fiber Gratings for Sensing Applications
… such as temperature, strain and ambient refractive index, LPGs can be used for sensing. However, traditional LPGs with gratings inscribed in the fibers can only sense a single point and cannot be used for distributed sensing. Although new ideas were proposed to use traveling LPG formed by …
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Probing light-matter interactions with differential polarizations: From chiral nanostructures to molecular sensing
… molecular sensing. Leveraging the polarization sensitivity and refractive index sensitivity of localized surface plasmon resonances, this work systematically probes light-matter interactions at the nanoscale. Emphasizing chiral optical phenomena, it demonstrates the fundamental understanding of …
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Creation of novel gold-nanorod-based localized surface plasmon resonance biosensors
… the sensor probe by a dip coating method. In the refractive index sensitivity test, it was found that the longitudinal plasmon band (LPB) of GNRs is highly sensitive to the refractive index change close to the GNRs surface, and the sensitivity of the LSPR optical fibre sensor increases with the …
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Plasmonic Optical Sensors: Performance Analysis and Engineering Towards Biosensing
… fundamental facts of surface plasmon theory. The sensitivity only depends on excitation light wavelength as well as dielectric properties of metal and dielectrics. The expression involves no structure-specified parameters, which validates this formula in broad cases of periodic, quasiperiodic and …