Transformation Electromagnetics concepts and applications
10:30 Invited talk : Engineering of electromagnetic emissions through Transformation Electromagnetics
S. N. Burokur, Paul-Henri Tichit, Jianjia Yi, Andre de Lustrac
Paris Sud University (France) Transformation Electromagnetics (TE) is an innovative concept that allows realizing electromagnetic devices in a novel way. It offers an unprecedented control of the routes of electromagnetic waves by properly designing artificial metamaterials for desired material parameters. We present the design of transformation media based devices able to tailor electromagnetic emissions in a unique way. The performances are validated numerically and experimentally.
10:50 Invited talk : Transformation optics with spatially dispersive media
Jie Luo (1),Yuting Yang (1),Zhihong Hang (1),C. T. Chan (2),Yun Lai (1)
(1)Soochow University (China) , (2)Hong Kong University of Science and Technology (Hong Kong) By designing pure dielectric photonic crystals with a shifted elliptical dispersion, we achieved ultra-transparent spatially dispersive media with the ability of forming ideal virtual images without aberrations. The ultra-transparency effect is experimentally demonstrated in microwave frequency regime. We further provide transformation optics examples based on such media. Our work provides a theory for realization of ultra-transparency with spatially dispersive media, opening new possibilities in optical designs such as wide-angle super-polarizer and transformation optics devices.
11:10 Invited talk : Surface Wave Manipulation Design
Luigi La Spada, Yang Hao
Queen Mary University of London (United Kingdom) In this paper a new design for surface waves manipulation is presented. A rotationally symmetric graded index media above a ground plane is used. First of all an analytical approach is developed to design the proposed structure. Then, the device is manufactured and measured in the range 8-10 GHz. The proposed approach is a useful tool for telecommunications and radar applications, paving the way for the design of conformal surface wave-based antenna devices in a broad frequency range.
11:30 Invited talk : Anti-Reflective Coatings for Gradient Index Lenses
Kenneth L. Morgan, Donovan H. Brocker, Xiande Wang, Douglas H. Werner, Pingjuan L. Werner
The Pennsylvania State University (USA) Anti-reflective coating designs for conventional lens systems are well-documented. However, the recent development of transformation optics has piqued interest in designing gradient index, particularly flattened, lenses. Previous works have not yet considered the application of anti-reflective coatings to such systems. Here, we present several anti-reflective coating designs developed for gradient index systems. Conventional design techniques are leveraged in conjunction with transformation optics to produce coatings that reduce reflections of a flat gradient-index lens.