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Opt Lett. 2012 Jun 1;37(11):2103-5. doi: 10.1364/OL.37.002103.

Total absorption of TM polarized light in a 100 nm spectral band in a nanopatterned thin a-Si film.

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  • 1Department of Electrical Engineering, University of Texas at Arlington, Box 19016, Arlington, Texas 76019, USA.


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

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