Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2010-05-26
Proceedings of SPIE, Vol. 7713, 771308 (2010)
Physics
Condensed Matter
Other Condensed Matter
6 pages. SPIE Photonics Europe paper
Scientific paper
10.1117/12.854035
The absorption of thin hydrogenated amorphous silicon layers can be efficiently enhanced through a controlled periodic patterning. Light is trapped through coupling with photonic Bloch modes of the periodic structures, which act as an absorbing planar photonic crystal. We theoretically demonstrate this absorption enhancement through one or two dimensional patterning, and show the experimental feasibility through large area holographic patterning. Numerical simulations show over 50% absorption enhancement over the part of the solar spectrum comprised between 380 and 750nm. It is experimentally confirmed by optical measurements performed on planar photonic crystals fabricated by laser holography and reactive ion etching.
Ahn Sungwoo
Cabarrocas Roca P. i.
Caurel Garcia E.
Daif Ounsi El
Drouard Emmanuel
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