Abstract

We report a leaky-mode resonant absorber fashioned as one-dimensional nanopatterned ultra-thin films. This simple structure exhibits optical absorbance of $\sim 66\%$ in the 300–750 nm wavelength band, which is an $\sim 60\%$ increase relative to a comparable planar reference structure. The transverse-magnetic (TM) polarized light in the $\sim 460–560\mathrm{nm}$ band is nearly totally absorbed. Applying a backside metal reflector raises the absorbance farther to $\sim 73\%$.

©2012 Optical Society of America

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