S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Electrical and Computer Engineering (전기·정보공학부) Theses (Master's Degree_전기·정보공학부)
Interface Design of Hyperbolic Metamaterials for Tunable Scattering
- 공과대학 전기·정보공학부
- Issue Date
- 서울대학교 대학원
- 학위논문 (석사)-- 서울대학교 대학원 : 전기·정보공학부, 2016. 2. 박남규.
- An interface between media plays a critical role in controlling the flow of elementary particles, by introducing the violated continuity of particle flows. In optics, the efficient change of wavevectors through interfaces has been the foundation of optical elements, such as mirrors, lens, and waveguides.
Overcoming the previous belief that the interface should be composed between ‘different’ media, the recently proposal of ‘metasurfaces’ which can be made in-between identical materials generates strong scattering of waves through the discontinuity in amplitude and phase across the surfaces. However, in spite of their name of meta-‘surface’, they are composed of elements with ‘finite’ thickness to increase the scattering. The benefits of a single interface have thus not been fully exploited in existing metasurfaces.
In this thesis, we investigate an artificial interface between identical metamaterials. From both analytic and numerical analysis, we verify that a dislocated interface between identical hyperbolic metamaterials can provide the full range of transmission phase shift with unity transmittance, including the regime of ‘phase reversal’. By exploiting the advantages of ‘zero-thickness’ phase control, various platforms based on the dislocated interfaces are proposed for applications on controlling wave propagation in hyperbolic metamaterials.