NEGATIVE-INDEX METAMATERIALS

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CHALLENGES WITH <strong>METAMATERIALS</strong> • Metamaterials remain impractical for most applications • Broadband optical metamaterials require resonant structures ~ 1 nm! • Best results attained in the microwave range • Ohmic losses to the metal resonators make metamaterials notoriously “lossy” • Problem for any device that requires high efficiency (microscopy, solar cells, cloaking) But there might still be hope… Two-dimensional cloaks. Images: WH Wee and JB Pendry 16
SUMMARY AND CONCLUSION • There is no theoretical restriction on the sign of refractive index– negative indices are not observed in nature but can be fabricated using metamolecules and the homogenization hypothesis • Metamaterials research offers both opportunities to study optical systems that were once purely theoretical • Incredible applications for technology if they could be made feasible • Many hurdles before metamaterials could be seen in widespread application 17
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 and 14: APPLICATIONS OF NIM • Provides op
Page 15: TRANSFORMATION OPTICS AND METAMATER
Page 19 and 20: SUPER-RESOLUTION MICROSCOPY • “
Page 21: Negative index metamaterials c) at

NEGATIVE-INDEX METAMATERIALS

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