Metamaterials: Negative refractive index in ... - Theory.nipne.ro

Partial conclusion and comments- Only the "classical" phenomena and configurations were considered- <strong>Negative</strong> refraction does not necessarily mean n < 0Photonic Crystals (PhC) can have negative refraction, though theydo not have n < 0 (they do not have a well-def<strong>in</strong>ed n eff at all)- PhC have low loss - can be used to obta<strong>in</strong> similar effects to those of MTM- Other approaches toward n < 0 Chirality (handedness) of structures(Chiral object - asymmetric to its mirror image)- New structures closer to isotropic MTM are conceived- Alternat<strong>in</strong>g layers of positive and negative <strong><strong>in</strong>dex</strong> MTM new properties(discrete or cont<strong>in</strong>uous transition considered)ASTiGMAT