Author : Hynek Nĕmec
Release : 2006
Genre :
Kind : eBook
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Book Synopsis Time-resolved Terahertz Spectroscopy Applied to the Investigation of Magnetic Materials and Photonic Structures by : Hynek Nĕmec
Download or read book Time-resolved Terahertz Spectroscopy Applied to the Investigation of Magnetic Materials and Photonic Structures written by Hynek Nĕmec. This book was released on 2006. Available in PDF, EPUB and Kindle. Book excerpt: Two distinct branches of optics are combined in this work: Time-domain terahertz spectroscopy, and photonic structures. The works at first provides a survey of tools utilized for exploration of the terahertz region, and it en riches them by a method for simultaneous determination of dielectric and magnetic response of materials and metamaterials. Photonic structures operating in the terahertz range form the subject of the rest of this thesis. A periodically modulated dielectric waveguide is studied theoretically using a modal method: ThE band structure of guided and leaky modes is calculated and resonant modes are described. One-dimensional photonic crystals with a defect are then investigated in detail. Formation of defect modes is analyzed theoretically in a photonic crystal with a twinning defect. The analysis makes it possible to formulate requirements on a design of a structure with defect modes tunable by external parameters. Following these guidelines, we have successfully designed, fabricated and characterized photonic crystals with thermally tunable defect modes with relative tunability reaching 60 %.