We demonstrate the fabrication of one-dimensional metallodielectric Bragg stacks (MDBSs) from spin-coated poly(methyl methacrylate) and evaporated Au layers; one-, two-, and three-bilayer structures are achieved with good homogeneity ( thickness variation). The linear reflection and transmission spectra show very strong modulation relative to the constituent materials for only a few bilayers; transmission windows associated with sharp Bragg resonances are observed at and , while other regions provide reflections of . Nonlinear absorption was measured by a z-scan technique and is observed to be enhanced at the Bragg resonances. The peak of the three-bilayer MDBS is enhanced by approximately seven times compared to a single Au film. The wavelength dependence of the nonlinear enhancement can be correlated with the attenuation parameter. The experimental results are in good agreement with numerical simulations based on a transfer-matrix method employing the known physical and optical parameters. The MDBSs show strong potential as versatile and inexpensive components for optical devices.
© 2006 Optical Society of AmericaFull Article | PDF Article
Eugene G. Bortchagovsky and Ulrich C. Fischer
Appl. Opt. 42(34) 6915-6918 (2003)
Yasin Ekinci, Harun H. Solak, Christian David, and Hans Sigg
Opt. Express 14(6) 2323-2334 (2006)
Nakeeran Ponnampalam and Ray G. DeCorby
Appl. Opt. 47(1) 30-37 (2008)