CHAPTER 5 a g i c
m i r r o r
In this last chapter, we summarize the main results presented in this collection of my articles, also highlighting possible future applications. In this thesis, focusing effects of a beam reflected from different modulated structures have been studied theoretically and experimentally. These include, beam focusing from a 1D chirped mirror, improvement of beam focusing by adding a defect layer, extremely long focal length of an optimized mirror, beam focalization at normal incidence with subwavelength gratings, negative GH shift and beam focusing with two parallel subwavelength gratings. The majority of the studied phenomena can be explained by the anomalous lateral shift at certain incidence angles and most of them have been proved by experimental results fitting well with the analytical and numerical predictions.
Page 31 | Flat Focusing Mirrors | Yu-Chieh Chengâ€™s Thesis | January 2015