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High transmission nanowire contact arrays with subwavelength spacing
Author(s) -
Román Etor San,
Vitrey Alan,
Buencuerpo Jerónimo,
Fernández Iván,
Prieto Iván,
Alén Benito,
GarcíaMartín Antonio,
Llorens José M.,
Brueck S. R. J.,
Ripalda José M.
Publication year - 2016
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.201510367
Subject(s) - nanowire , materials science , photocurrent , perpendicular , extraordinary optical transmission , polarization (electrochemistry) , contact resistance , optoelectronics , optics , electrical conductor , transmission (telecommunications) , planar , surface plasmon , nanotechnology , plasmon , surface plasmon polariton , physics , composite material , layer (electronics) , geometry , telecommunications , chemistry , mathematics , computer graphics (images) , computer science
We demonstrate high optical transmission in solar cell contacts based on nanowire arrays with subwavelength spacing. The photocurrent results obtained from fabricated devices are compared with numerical simulations. The proposed contact design leads to optical losses significantly smaller than the fraction of the top surface taken up by the metallic contact (<10% vs. 36%). The resulting sheet resistance of the contact is 46.7 Ω/square, comparing favourably with transparent conductive oxides.Normalized electric field magnitude at λ = 887 nm, polarization perpendicular to the nanowires. The black contours indicate the position of the nanowires and the GaAs surface. The reflected wave‐front is undisturbed by the subwavelength array (period = 250 nm), but the transmitted light is strongly scattered in a Talbot effect pattern. (© 2016 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim)