Metamaterial-Based Electromagnetic Tunneling Effect for Wireless Energy Transfer
Li Yunhui, Chen Yongqiang, Feng Tuanhui, Fang Kai, Zhang Yewen, Chen Hong
Key Laboratory of Advanced Micro-structure Materials Ministry of Education School of Physics Science and Engineering Tongji University Shanghai 200092 China
In this paper, a sandwich structure composed of two different single negative metamaterial layers separated by air is proposed to improve the efficiency of wireless energy transfer. Numerical analysis reveals that by tuning the metamaterials, electromagnetic tunneling phenomena can occur even through a long distance over several hundred times of device length, which is far beyond mid-range. To verify the above analysis, mesh-like and double-sheet metal structures that play the roles of two different single negative metamaterials are fabricated and measured at microwave range. The experimental results show that the energy transfer efficiency, as well as the transfer distance may be superior to some conventional methods proposed previously. These features will be beneficial to the realistic application of wireless energy transfer.
[1] Kurs A, Karalis A, Moffatt R, et al. Wireless power transfer via strongly coupled magnetic resonances[J]. Science, 2007, 317(6): 83-86.
[2] Liu R, Zhao B, Lin X Q, et al. Experimental observation of evanescent-wave amplification and propagation in microwave regime[J]. Applied Physics Letter, 2006, 89(22): 221919(1-3).
[3] Baena J D, Jelinek L, Marques R, et al. Near-perfect tunneling and amplification of evanescent electro- magnetic waves in a waveguide filled by a metama- terial: theory and experiments[J]. Physical Review B, 2005, 72(7): 075116(1-8).
[4] Kim K Y, Lee B. Complete tunneling of light through impedance-mismatched barrier layers[J]. Physical Review A, 2008, 77(2): 023822(1-7).
[5] Ahmadi A, Mosallaei H. Physical configuration and performance modeling of all-dielectric metamaterials[J]. Physical Review B, 2008, 77(4): 045104(1-11).
[6] Pendry J B. Negative refraction makes a perfect lens[J]. Physical Review Letters, 2000, 85(18): 3966-3969.
[7] Grbic A, Eleftheriades G V. Overcoming the diffra- ction limit with a planar left-handed transmission- line lens[J]. Physical Review Letters, 2004, 92(11): 11703(1-4).
[8] Garcia de Abajo F J, Gomez-Santos G, Blanco L A, et al. Tunneling mechanism of light transmission through metallic films[J]. Physical Review Letters, 2005, 95(6): 067403(1-4).
[9] Cai W, Chettiar U K, Kildishev A V, et al. Optical cloaking with metamaterials[J]. Nature Photonics, 2007, 1(4): 224-227.
[10] Alu A, Engheta N. Pairing an epsilon-negative slab with a mu-negative slab: resonance, tunneling and transparency[J]. IEEE Transactions on Antennas and Propagation, 2003, 51(10): 2558-2571.
[11] Guan G S, Jiang H T, Li H Q, et al. Tunneling modes of photonic heterostructures consisting of single-negative materials[J]. Applied Physics Letter, 2006, 88(21): 211112(1-3).
[12] Zhou L, Wen W J, Chan C T, et al. Electromagnetic- wave tunneling through negative-permittivity media with high magnetic fields[J]. Physical Review Letters, 2005, 94(24): 243905(1-4).
[13] Jiang H T, Chen H, Li H Q, et al. Omnidirectional gap and defect mode of one-dimensional photonic crystals containing negative-index materials[J]. Applied Physics Letter, 2003, 83(26): 5386(1-3).
2016, Vol. 31 
