Super Unit Cells in Aperture-Based Metamaterials
Апстракт
An important class of electromagnetic metamaterials are aperture-based metasurfaces. Examples include extraordinary optical transmission arrays and double fishnets with negative refractive index. We analyze a generalization of such metamaterials where a simple aperture is now replaced by a compound object formed by superposition of two or more primitive objects (e.g., rectangles, circles, and ellipses). Thus obtained "super unit cell" shows far richer behavior than the subobjects that comprise it. We show that nonlocalities introduced by overlapping simple subobjects can be used to produce large deviations of spectral dispersion even for small additive modifications of the basic geometry. Technologically, some super cellsmay be fabricated by simple spatial shifting of the existing photolithographic masks. In our investigation we applied analytical calculations and ab initio finite element modeling to prove the possibility to tailor the dispersion including resonances for plasmonic nano...composites by adjusting the local geometry and exploiting localized interactions at a subwavelength level. Any desired form could be defined using simple primitive objects, making the situation a geometrical analog of the case of series expansion of a function. Thus an additional degree of tunability of metamaterials is obtained. The obtained designer structures can be applied in different fields like waveguiding and sensing.
Извор:
Journal of Nanomaterials, 2015Издавач:
- Hindawi Limited
Финансирање / пројекти:
DOI: 10.1155/2015/312064
ISSN: 1687-4110
WoS: 000349203900001
Scopus: 2-s2.0-84937144457
Институција/група
IHTMTY - JOUR AU - Tanasković, Dragan AU - Jakšić, Zoran AU - Obradov, Marko AU - Jakšić, Olga PY - 2015 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/1807 AB - An important class of electromagnetic metamaterials are aperture-based metasurfaces. Examples include extraordinary optical transmission arrays and double fishnets with negative refractive index. We analyze a generalization of such metamaterials where a simple aperture is now replaced by a compound object formed by superposition of two or more primitive objects (e.g., rectangles, circles, and ellipses). Thus obtained "super unit cell" shows far richer behavior than the subobjects that comprise it. We show that nonlocalities introduced by overlapping simple subobjects can be used to produce large deviations of spectral dispersion even for small additive modifications of the basic geometry. Technologically, some super cellsmay be fabricated by simple spatial shifting of the existing photolithographic masks. In our investigation we applied analytical calculations and ab initio finite element modeling to prove the possibility to tailor the dispersion including resonances for plasmonic nanocomposites by adjusting the local geometry and exploiting localized interactions at a subwavelength level. Any desired form could be defined using simple primitive objects, making the situation a geometrical analog of the case of series expansion of a function. Thus an additional degree of tunability of metamaterials is obtained. The obtained designer structures can be applied in different fields like waveguiding and sensing. PB - Hindawi Limited T2 - Journal of Nanomaterials T1 - Super Unit Cells in Aperture-Based Metamaterials DO - 10.1155/2015/312064 ER -
@article{ author = "Tanasković, Dragan and Jakšić, Zoran and Obradov, Marko and Jakšić, Olga", year = "2015", abstract = "An important class of electromagnetic metamaterials are aperture-based metasurfaces. Examples include extraordinary optical transmission arrays and double fishnets with negative refractive index. We analyze a generalization of such metamaterials where a simple aperture is now replaced by a compound object formed by superposition of two or more primitive objects (e.g., rectangles, circles, and ellipses). Thus obtained "super unit cell" shows far richer behavior than the subobjects that comprise it. We show that nonlocalities introduced by overlapping simple subobjects can be used to produce large deviations of spectral dispersion even for small additive modifications of the basic geometry. Technologically, some super cellsmay be fabricated by simple spatial shifting of the existing photolithographic masks. In our investigation we applied analytical calculations and ab initio finite element modeling to prove the possibility to tailor the dispersion including resonances for plasmonic nanocomposites by adjusting the local geometry and exploiting localized interactions at a subwavelength level. Any desired form could be defined using simple primitive objects, making the situation a geometrical analog of the case of series expansion of a function. Thus an additional degree of tunability of metamaterials is obtained. The obtained designer structures can be applied in different fields like waveguiding and sensing.", publisher = "Hindawi Limited", journal = "Journal of Nanomaterials", title = "Super Unit Cells in Aperture-Based Metamaterials", doi = "10.1155/2015/312064" }
Tanasković, D., Jakšić, Z., Obradov, M.,& Jakšić, O.. (2015). Super Unit Cells in Aperture-Based Metamaterials. in Journal of Nanomaterials Hindawi Limited.. https://doi.org/10.1155/2015/312064
Tanasković D, Jakšić Z, Obradov M, Jakšić O. Super Unit Cells in Aperture-Based Metamaterials. in Journal of Nanomaterials. 2015;. doi:10.1155/2015/312064 .
Tanasković, Dragan, Jakšić, Zoran, Obradov, Marko, Jakšić, Olga, "Super Unit Cells in Aperture-Based Metamaterials" in Journal of Nanomaterials (2015), https://doi.org/10.1155/2015/312064 . .