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Surface plasmon-induced absorption enhancement of silicon nanowire array

Title
Surface plasmon-induced absorption enhancement of silicon nanowire array
Authors
Lee E.Zhou K.Gwon M.Jung J.-Y.Lee J.-H.Kim D.-W.
Ewha Authors
김동욱
SCOPUS Author ID
김동욱scopus
Issue Date
2012
Journal Title
Proceedings of SPIE - The International Society for Optical Engineering
ISSN
0277-786XJCR Link
Citation
vol. 8457
Indexed
SCOPUS scopus
Abstract
We have investigated optical characteristics of silicon nanowire (Si NW) on Al disk arrays using the finite-difference time-domain (FDTD) simulations. Without the Al disk, the Si NW arrays alone exhibit strong absorption peaks, originated from guided mode resonance. The arrays of SiNW with Al disk possess additional broad peaks, at slightly larger wavelengths than those of the resonant guided mode peaks. The FDTD simulations show formation of concentrated electromagnetic field at the Si NW/Al interface, indicating excitation of localized surface plasmons. These results suggest that bottom-contact electrodes can work as means to enhance the optical absorption of the Si NWs as well as to collect carriers in Si NW-based optoelectronic devices. © 2012 SPIE.
DOI
10.1117/12.929302
ISBN
9780819491749
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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