Title
Efficient and Tunable Light Trapping Thin Films
Abbreviated Journal Title
J. Phys. Chem. C
Keywords
DISCRETE-DIPOLE APPROXIMATION; LOW-REFRACTIVE-INDEX; PERFECT; ANTIREFLECTION COATINGS; SILICON SOLAR-CELLS; REFLECTION; ABSORPTION; SURFACES; DESIGN; PERFORMANCE; DEPOSITION; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, ; Multidisciplinary
Abstract
Using the discrete dipole approximation method, we demonstrated enhanced absorption efficiencies, which are close to 100%, at tunable wavelengths in a two-layer silver thin film. The film is composed of a 100 nm thick perforated layer facing the incident light and a 100 nm thick solid layer. Resonance wavelengths are determined by the distances between perforated holes in the first layer as well as the separation between the two layers. The resonance wavelengths shift to the red with increasing separation distance between the two layers or the periodic distance of the hole arrays. Geometries of conical frustum shaped holes in the first layer are critical for the improved absorption efficiencies. When the hole bottom diameter equals the periodic distance and the upper diameter is about one-third of the bottom diameter, close to unit absorption efficiency can be obtained. The simulations provide a proof of concept example for designing ultrathin antireflection films.
Journal Title
Journal of Physical Chemistry C
Volume
114
Issue/Number
5
Publication Date
1-1-2010
Document Type
Article
DOI Link
Language
English
First Page
2066
Last Page
2069
WOS Identifier
ISSN
1932-7447
Recommended Citation
"Efficient and Tunable Light Trapping Thin Films" (2010). Faculty Bibliography 2010s. 999.
https://stars.library.ucf.edu/facultybib2010/999
Comments
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