준주기적 매질에서의 전자기파의 전파
Propagation of electromagnetic waves in photonic quasicrystals
- 주제(키워드) quasi periodic multilayers , wave propagation , surface plasmon excitation
- 발행기관 아주대학교 대학원
- 지도교수 김기홍
- 발행년도 2008
- 학위수여년월 2008. 2
- 학위명 석사
- 학과 및 전공 일반대학원 에너지시스템학부
- 본문언어 영어
초록/요약
In this study we consider multilayered structures made of two kind of materials A and B. Layers are arranged according to generation rules of quasi periodic sequences. First we study the evanescent waves in Fibonacci layers. One of the slab has lower refractive index than surrounding media so that incident wave becomes evanescent in that slabs. The transmission spectra shows peaks above the critical angle for both s and p waves. The calculation of phase of transmission and distribution of field amplitude confirms that this is kind of resonance. We also find that peaks are more sharp as the generation number increases. We also set the quasi periodic layers made of metal and dielectric slabs. One of the study in this materials is surface plasmon excitation and another study is large amount of absorption of incident electromagnetic waves in quasi periodic multilayers. We shows that surface plasma waves can be excited at the boundaries between metal and dielectric layers by calculating distribution of field amplitude. Finally, we made of quasi periodic layers made of Ti, TiO2. We find condition that makes transmission large. In that region absorption becomes bigger as the generation number increases. Field distribution of Fibonacci, Thue-Morse and double period sequences shows the character of quasi periodic layers as well as large absorption in the absorption spectra.
more목차
Chapter 1 Introduction = 1
Chapter 2 Invariant imbedding method = 3
2.1 Introduction = 3
2.2 Invariant imbedding equation = 3
Chapter 3 Wave propagation in dielectric quasi periodic multilay-ers = 8
3.1 Resonance of evanescent waves in Fibonacci dielectric multilayers = 8
3.1.1 Introduction = 8
3.1.2 result = 9
Chapter 4 Wave propagation in metal-dielectric quasi periodic mul-tilayers = 21
4.1 Surface plasmon excitation in Fibonacci metal-dielectric multilayers = 21
4.1.1 Introduction = 21
4.1.2 Result = 22
4.2 Wave propagation in metal-dielectric multilayers = 24
4.2.1 Introduction = 24
4.2.2 Result = 24
Chapter 5 Conclusion = 45
