NEGATIVE-INDEX METAMATERIALS

More documents

Recommendations

Info

TRANSFORMATION OPTICS AND METAMATERIAL CLOAKING • John Pendry proposed in 2006 a way of controlling electromagnetic radiation using metamaterials that could obscure objects– transformation optics was born • The mathematical technique of transformation optics shows media with gradients in optical properties are equivalent to curved geometries of spacetime for light propagation • Uses coordinate transformations to predict optical properties required for particular ray manipulations ! ! !, !, ! , ! ! !, !, ! , ! ! (!, !, !)! ! !! ! ! = ! !! ! !! ! ! ! ! ! ! ! q 1 q 2 ! !! ! ! = ! ! !! !! ! ! ! ! ! ! Where%i%=%1,%2,%3%and%% ! % ! ! ! = !" !! ! ! Where i = 1, 2, 3 and + !" !! ! ! + !" !! ! ! % 14
TRANSFORMATION OPTICS AND METAMATERIAL CLOAKING • Goal: use transformation optics and metamaterials to direct EM radiation smoothly around an object to render it invisible • Fine print: object would be plunged into darkness and would not be able to see out… • Pendry et al. showed this theoretically and experimentally in 2010 but there are still many issues before perfect cloaking can be realized • Potential in digital metamaterials? (Giovampaola 2014) b a Pendry, J., Schurig, D., & Smith, D. (2006). Controlling Electromagnetic Fields. Science, 1780-1782. 15
Page 1 and 2: NEGATIVE-INDEX METAMATERIALS Sarah
Page 3 and 4: WHAT ARE METAMATERIALS? • Man-mad
Page 5 and 6: NEGATIVE INDEX OF REFRACTION • No
Page 7 and 8: NEGATIVE INDEX OF REFRACTION • So
Page 9 and 10: REAL NEGATIVE-INDEX METAMATERIALS
Page 11 and 12: Split-ring resonators Wires Microwa
Page 13: APPLICATIONS OF NIM • Provides op
Page 17 and 18: SUMMARY AND CONCLUSION • There is
Page 19 and 20: SUPER-RESOLUTION MICROSCOPY • “
Page 21: Negative index metamaterials c) at

NEGATIVE-INDEX METAMATERIALS

Create successful ePaper yourself

Delete template?

Save as template?