| Autor: |
Lee, Sam Hyeon, Park, Choon Mahn, Seo, Yong Mun, Wang, Zhi Guo, Kim, Chul Koo |
| Rok vydání: |
2008 |
| Předmět: |
|
| Zdroj: |
Phys. Lett. A 373 (2009) 4464-4469 |
| Druh dokumentu: |
Working Paper |
| Popis: |
We report theoretical and experimental results for a new type of homogenized acoustic metamaterials with negative effective mass density. We constructed one-dimensional metamaterial, which is a tube with an array of very thin elastic membranes placed inside. This structure exhibited negative effective density in the frequency range from 0 to 735 Hz. The experimental result is in excellent agreement with our theoretical model that predicts negative effective density below a cut-off frequency. The frequency characteristics of this effective density is analogous to that of the permittivity of the electromagnetic plasma oscillation. |
| Databáze: |
arXiv |
| Externí odkaz: |
|
