title: Overlapping illusions by transformation optics without any negative refraction material.
abstract: A novel method to achieve an overlapping illusion without any negative refraction index material is introduced with the help of the optic-null medium (ONM) designed by an extremely stretching spatial transformation. Unlike the previous methods to achieve such an optical illusion by transformation optics (TO), our method can achieve a power combination and reshape the radiation pattern at the same time. Unlike the overlapping illusion with some negative refraction index material, our method is not sensitive to the loss of the materials. Other advantages over existing methods are discussed. Numerical simulations are given to verify the performance of the proposed devices.
authors.affiliation: Centre for Optical and Electromagnetic Research, Zhejiang Provincial Key Laboratory for Sensing Technologies, JORCEP, East Building #5,Zijingang Campus, Zhejiang University, Hangzhou 310058, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Sun
authors.affiliation: Centre for Optical and Electromagnetic Research, Zhejiang Provincial Key Laboratory for Sensing Technologies, JORCEP, East Building #5,Zijingang Campus, Zhejiang University, Hangzhou 310058, China.|Department of Electromagnetic Engineering, School of Electrical Engineering, Royal Institute of Technology (KTH), S-10044 Stockholm, Sweden.
authors.forename: Sailing
authors.initials: S
authors.lastname: He