Greetings, what literally governs the metamaterial to render epsilon negative or mu negative phenomena. Is there any theory behind finding the same by looking at the structural design of metamaterial unit element without implementing the same in terms of simulations?????????????
Epsilon ve mu 'yu negatif fenomeni haline getiren malzemenin ayırtedici ve ortak özellikleridir. Metamalzeme birim elemanının yapısal tasarımına bakarak aynı şeyi bulmanın arkasında genellikle bu özellikler yatar.
Şükrü Aktaş Selamlar, katılıyorum, ancak epsilon ve mu negatif olaylarını yönetmek için meta materyalin yapısal çeşitliliğine ilişkin bazı gerçekler göz ardı edilemez.
The fundamental principles of metamaterials are rooted in effective medium theory; effective constitutive parameters of these structures are largely dependent on the individual properties of the unit cells or meta-atoms. There are different homogenization techniques to analytically retrieve effective permittivities and permeabilities of certain metamaterial structures, such as wire media and split ring resonators:
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Some of these models are based on the analogies between electric (or effective magnetic) current densities in the meta-atoms and free-electrons in a cold plasma, which yield Drude-like dispersion formulas. For analytical modeling of metamaterial structures, you may want to check the following books:
- Analytical Modeling in Applied Electromagnetics by Sergei Tretyakov
- Electromagnetic Metamaterials: Transmission Line Theory and Microwave Applications by Christophe Caloz and Tatsuo Itoh
Nevertheless, for metamaterials with more complex unit cells, numerical or experimental retrieval of effective parameters would be necessary.
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