Maaroof Abbas I, Cortie Michael B, Harris Nadine, Wieczorek Lech
Institute for Nanoscale Technology, University of Technology, Sydney PO Box 123, Broadway NSW 2007, Australia.
Small. 2008 Dec;4(12):2292-9. doi: 10.1002/smll.200800203.
2D arrays of silver semi-shells of 100 and 200 nm diameter display complex reflection and transmission spectra in the visible and near-IR. Here these spectral features are deconstructed and it is demonstrated that they result from the coupling of incident light into a delocalized Bragg plasmon, and the latter's induction of localized Mie plasmons in the arrays. These phenomena permit the excitation of transverse dipolar plasmon resonances in the semi-shells despite an ostensibly unfavorable orientation with respect to normally incident light. The resulting spectral feature in the mid-visible is strong and tunable.
直径为100和200纳米的银半壳二维阵列在可见光和近红外区域呈现出复杂的反射和透射光谱。在此，对这些光谱特征进行了解析，并证明它们是由入射光耦合到离域布拉格等离子体中，以及后者在阵列中诱导局域米氏等离子体所致。尽管相对于正常入射光而言，半壳的取向表面上不利，但这些现象仍能激发半壳中的横向偶极等离子体共振。在可见光中部产生的光谱特征很强且可调。
