Gain assisted nanocomposite multilayers with near zero permittivity modulus at visible frequencies
Abstract
We have fabricated a nano-laminate by alternating metal and gain medium layers, the gain dielectric consisting of a polymer incorporating optically pumped dye molecules. From standard reflection-transmission experiments, we show that, at a visible wavelength, both the real and the imaginary parts of the permittivity epsilon(parallel to) attain very small values and we measure, at lambda = 604 nm, vertical bar epsilon(parallel to)vertical bar = 0.04 which is 21.5% smaller than its value in the absence of optical pumping. Our investigation thus proves that a medium with a permittivity with very small modulus, a key condition promising efficient subwavelength optical steering, can be actually synthesized.
Citation
Rizza , C , Di Falco , A & Ciattoni , A 2011 , ' Gain assisted nanocomposite multilayers with near zero permittivity modulus at visible frequencies ' , Applied Physics Letters , vol. 99 , no. 22 , 221107 . https://doi.org/10.1063/1.3665414
Publication
Applied Physics Letters
Status
Peer reviewed
ISSN
0003-6951Type
Journal article
Collections
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