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Amplification of the zeroth Order mode in ultra-thin layers

AuthorsLlorens Montolio, José Manuel ; Buencuerpo, Jerónimo ; Ripalda, José María ; Postigo, Pablo Aitor
KeywordsSolar cells
Quasinormal modes
Optical coating
Issue Date1-Aug-2016
PublisherRiver Publishers
CitationJournal of Green Engineering 5(3-4): 71-82 (2016)
AbstractThe ultra-thin limit regime is characterized by a structure which at least in one dimension is significantly smaller than the incoming light wavelength. The absorption in this regime is characterized either by very weak absorption or by a broad peak attributed to the zeroth order Fabry-Perot mode. We show that this mode provides a 14.5% ultimate efficiency in a 25 nm GaAs slab on a gold substrate. GaAs in air achieves only a 5% for a 10 nm slab. Such an amplification of the resonance absorption is attributed to the high losses of the substrate. For very high losses, the zeroth order mode transits from an over-damped regime to an under-damped one.
Publisher version (URL)https://doi.org/10.13052/jge1904-4720.5345
Appears in Collections:(IMN-CNM) Artículos
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