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Surface plasmons on nanostructures
Kvasnička, Pavel
Title: Surface plasmons on nanostructures Author: Pavel Kvasnička Department: Department of Optics and Optoelectronics Supervisor: Jiří Homola, PhD, Institute of Photonics and Electronics, Chaberská 57, 182 57 Prague 8 Supervisor's e-mail address: homola@ufe.cz Abstract: An introduction to the field of (bio)sensors based on localized surface plasmons (LSP) on metallic nanoparticles is given. Description of theoretical ap- proaches to modeling of localized surface plasmons on nanoparticles and nanostruc- tures is given. These techniques are used to study the process of optical excitation of localized surface plasmons on individual metallic nanoparticles and to detemine main performance characteristics of LSP-based sensors. Experimental study of LSP on spherical nanoparticles is reported. It is demonstrated that metallic nanoparticles supporting LSP can be used to detect changes in the refractive index or molecular binding events. Keywords: surface plasmon, nanoparticles, surface plasmon resonance sensors
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Surface plasmons in optical microstructures and their sensor applications
Adam, Pavel ; Homola, Jiří (advisor) ; Brynda, Eduard (referee) ; Richter, Ivan (referee)
Title: Surface plasmons in optical microstructures and their sensor applications Author: Pavel Adam Institute: Institute of Photonics and Electronics AS CR, v.v.i., Department of Optical Sensors Supervisor of the doctoral thesis: doc. Ing. Jiří Homola, CSc., DSc. Abstract: This work is focused on the study of surface plasmon resonance (SPR) sensor platforms based on wavelength division multiplexing (WDM) of multiple surface plasmons (SPs). These sensors are based on advanced diffraction gratings supporting either conventional or Bragg-scattered SPs, which are simultaneously excited at different wavelengths. These SPs are studied both analytically and numerically using rigorous coupled-wave analysis and an integral approach. WDM of two and three SPs is presented and followed by the method for the analysis of the resolution, noise and cross-sensitivity. This method is employed to analyze the ability of different SPR sensor platforms (supporting WDM of two SPs) to discriminate refractive index (RI) changes in a thin layer at the sensor surface from background RI changes. The WDM SPR sensors based on advanced diffraction gratings prepared by interferometric holography are developed and tested in a model biosensing experiment consisting of the layer-by-layer growth of protein multilayers. The linear WDM of two...
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Surface plasmons on nanostructures
Kvasnička, Pavel
Title: Surface plasmons on nanostructures Author: Pavel Kvasnička Department: Department of Optics and Optoelectronics Supervisor: Jiří Homola, PhD, Institute of Photonics and Electronics, Chaberská 57, 182 57 Prague 8 Supervisor's e-mail address: homola@ufe.cz Abstract: An introduction to the field of (bio)sensors based on localized surface plasmons (LSP) on metallic nanoparticles is given. Description of theoretical ap- proaches to modeling of localized surface plasmons on nanoparticles and nanostruc- tures is given. These techniques are used to study the process of optical excitation of localized surface plasmons on individual metallic nanoparticles and to detemine main performance characteristics of LSP-based sensors. Experimental study of LSP on spherical nanoparticles is reported. It is demonstrated that metallic nanoparticles supporting LSP can be used to detect changes in the refractive index or molecular binding events. Keywords: surface plasmon, nanoparticles, surface plasmon resonance sensors
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