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Vedené vlny v periodických strukturách a jejich senzorové aplikace
Vala, Milan ; Homola, Jiří (advisor) ; Richter, Ivan (referee)
This work is introduced by the description of fundamental properties of surface plasmons, propagating along the metal-dielectric interface and along the structure with thin metal film surrounded by the dielectrics with identical refractive indices. It is shown, that the excitation of two coupled modes (long-range surface plasmon - LRSP and short-range surface plasmon - SRSP) on symmetrical structure with a thin metal film is possible. Further, a brief overview of surface plasmons applications in optical sensors is presented. The diffractive multi-layer structure supporting LRSP and SRSP modes, which consists of the thin gold film surrounded by the dielectrics with slightly different refractive indices is designed. The diffractive structure is optimized using rigorous integral method for an application in SPR sensor. Diffractive structures with optimal parameters are prepared and characterized optically and using atomic force microscopy. In the end, an application of developed diffractive structure in SPR sensor with wavelength modulation is demonstrated.
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Complex diffractive structures for surface plasmon resonance sensors
Vala, Milan ; Homola, Jiří (advisor) ; Richter, Ivan (referee) ; Procházka, Marek (referee)
Title: Complex diffractive structures for surface plasmon resonance sensors Author: Milan Vala Institute of Photonics and Electronics ASCR, v.v.i. Supervisor of the doctoral thesis: Prof. Jiří Homola, Ph.D., DSc. Institute of Photonics and Electronics, ASCR, v.v.i. Abstract: Nowadays, biosensors based on surface plasmon resonance (SPR) present one of the most advanced label-free optical biosensor technologies. These sensors are based on the monitoring of refractive index changes in the vicinity of a plasmonic metal and enable both rapid and sensitive detection of various biological or chemical agents as well as the analysis of biomolecular interactions in real time. This doctoral thesis presents the results of research of advanced diffractive structures having benefits for SPR biosensor technology. In addition to a theoretical analysis, this work consists of the fabrication and characterization of selected diffractive structures, and furthermore, the development of novel types of SPR biosensors based on these structures. In particular, the results presented in this thesis include the development of a novel method of fabrication of periodic plasmonic arrays based on multiple-beam interference lithography, the development of compact high-resolution diffraction grating-based SPR devices, and development of...
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Vedené vlny v periodických strukturách a jejich senzorové aplikace
Vala, Milan ; Homola, Jiří (advisor) ; Richter, Ivan (referee)
This work is introduced by the description of fundamental properties of surface plasmons, propagating along the metal-dielectric interface and along the structure with thin metal film surrounded by the dielectrics with identical refractive indices. It is shown, that the excitation of two coupled modes (long-range surface plasmon - LRSP and short-range surface plasmon - SRSP) on symmetrical structure with a thin metal film is possible. Further, a brief overview of surface plasmons applications in optical sensors is presented. The diffractive multi-layer structure supporting LRSP and SRSP modes, which consists of the thin gold film surrounded by the dielectrics with slightly different refractive indices is designed. The diffractive structure is optimized using rigorous integral method for an application in SPR sensor. Diffractive structures with optimal parameters are prepared and characterized optically and using atomic force microscopy. In the end, an application of developed diffractive structure in SPR sensor with wavelength modulation is demonstrated.
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