Efficient absorption of visible radiation by gap plasmon resonators
Efficient absorption of visible radiation by gap plasmon resonators
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DOI：
10.1364/oe.20.013311
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发表时间：
2012-06-04
期刊：
影响因子：
3.8
通讯作者：
Bozhevolnyi, Sergey I.
中科院分区：
文献类型：
--
作者：
Nielsen, Michael G.;Pors, Anders;Bozhevolnyi, Sergey I.
我们实验证明了一个周期性阵列的不同大小和圆形的间隙等离子体共振器（GPR）的平均吸收类似于94%的非偏振光在整个可见光波长范围内（400- 750 nm）。微元模拟验证了偏振不敏感宽带吸收源于局部间隙表面等离子体激元的共振激发仅弱依赖于入射角。GPR阵列还表现出增强的局部场强（类似于115），如通过扫描双光子光致发光显微镜所揭示的，其与相应的线性反射光谱中的最小值在光谱上相关。(C)2012美国光学学会
We demonstrate experimentally a periodic array of differently-sized and circularly-shaped gap plasmon resonators (GPRs) with the average absorption similar to 94% for unpolarized light in the entire visible wavelength range (400-750nm). Finite-element simulations verify that the polarization insensitive broadband absorption originates from localized gap surface plasmons whose resonant excitations only weakly depend on the angle of incidence. Arrays of GPRs also exhibit enhanced local field intensities (similar to 115) as revealed by scanning two-photon photoluminescence microscopy, that are spectrally correlated with the minima in corresponding linear reflection spectra. (C) 2012 Optical Society of America