Light absorption enhancement in thin silicon film by embedded metallic nanoshells

被引：16
|
作者：
Guilatt, Oren [1 ]
Apter, Boris [2 ]
Efron, Uzi [1 ,2 ]
机构：
[1] Ben Gurion Univ Negev, Dept Electroopt Engn, IL-84105 Beer Sheva, Israel
[2] Holon Inst Technol, Dept Elect Engn, IL-58102 Holon, Israel
来源：
OPTICS LETTERS | 2010年 / 35卷 / 08期
关键词：
SOLAR-CELLS;
D O I：
10.1364/OL.35.001139
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Computer simulation studies of absorption enhancement in a silicon (Si) substrate by nanoshell-related localized surface plasmon resonance (LSPR) based on a finite-difference time-domain analysis are presented. The results of these studies show significant enhancement of over 15X in the near-bandgap spectral region of Si, using 40 nm diameter, two-dimensional silver (Ag) nanoshells, simulating cylindrical nanoshell structure. The studies also indicate a clear advantage of the cylindrical nanoshell structure over that of a completely filled Ag-nanocylinders. The enhancement was studied as a function of the metallic shell thickness. The results suggest that the main enhancement mechanism in this case of tubular nanoshells embedded in the Si substrate is that of field-enhanced absorption caused by the strong LSPR-enhanced electric field, extending into the silicon substrate. (C) 2010 Optical Society of America
引用
收藏
页码：1139 / 1141
页数：3
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