Experimental demonstration of near-infrared epsilon-near-zero multilayer metamaterial slabs.

Citation data:

Optics express, ISSN: 1094-4087, Vol: 21, Issue: 20, Page: 23631-9

Publication Year:
2013
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Captures 38
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Citations 16
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Repository URL:
http://scholarsmine.mst.edu/mec_aereng_facwork/726
PMID:
24104275
DOI:
10.1364/oe.21.023631
Author(s):
Yang, Xiaodong; Hu, Changyu; Deng, Huixu; Rosenmann, Daniel; Czaplewski, David A.; Gao, Jie
Publisher(s):
The Optical Society; Optical Society of America
Tags:
Physics and Astronomy; Aerospace Engineering; Mechanical Engineering
article description
Near-infrared epsilon-near-zero (ENZ) metamaterial slabs based on silver-germanium (Ag-Ge) multilayers are experimentally demonstrated. Transmission, reflection and absorption spectra are characterized and used to determine the complex refractive indices and the effective permittivities of the ENZ metamaterial slabs, which match the results obtained from both the numerical simulations and the optical nonlocalities analysis. A rapid post-annealing process is used to reduce the collision frequency of silver and therefore decrease the optical absorption loss of multilayer metamaterial slabs. Furthermore, multilayer grating structures are studied to enhance the optical transmission and also tune the location of ENZ wavelength. The demonstrated near-infrared ENZ multilayer metamaterial slabs are important for realizing many exotic applications, such as phase front shaping and engineering of photonic density of states.