Gain assisted nanocomposite multilayers with near zero permittivity modulus at visible frequencies

Carlo Rizza, Andrea Di Falco, Alessandro Ciattoni

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)
1 Downloads (Pure)

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.

Original languageEnglish
Article number221107
Number of pages3
JournalApplied Physics Letters
Volume99
Issue number22
DOIs
Publication statusPublished - Nov 2011

Keywords

  • Permittivity
  • Silver
  • Dielectrics
  • Optical pumping
  • Effective medium theory

Fingerprint

Dive into the research topics of 'Gain assisted nanocomposite multilayers with near zero permittivity modulus at visible frequencies'. Together they form a unique fingerprint.

Cite this