Acoustic metamaterial exhibiting four different sign combinations of density and modulus

Autor:	Seo, Yong Mun, Park, Jong Jin, Lee, Seung Hwan, Park, Choon Mahn, Kim, Chul Koo, Lee, Sam Hyeon
Rok vydání:	2011
Předmět:	Condensed Matter - Materials Science Physics - Optics
Druh dokumentu:	Working Paper
DOI:	10.1063/1.3676262
Popis:	We fabricated a double negative acoustic metamaterial which consisted of Helmholtz resonators and membranes. Experimental data on the transmission and dispersion relation are presented. The system exhibits three frequencies where the acoustic state makes sharp transitions from density negative ({\rho} -NG) to double negative (DNG), modulus negative (B-NG), and double positive (DPS) in sequence with the frequency. We observed a wide range of negative refractive index from -0.06 to -3.7 relative to air, which will allow for new acoustic transformation techniques. Comment: 5 pages, 4 figures, submitted to Physical Review Letters
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1102.1767 Zobrazit plný text záznamu View this record from Arxiv