https://scholars.lib.ntu.edu.tw/handle/123456789/424837
標題: | Resonance modes, cavity field enhancements, long-range collective photonic effects in periodic bowtie nanostructures | 作者: | Hsueh C.-H. Lin C.-H. Li J.-H. Hatab N.A. CHUN-HWAY HSUEH JIA-HAN LI |
公開日期: | 2011 | 卷: | 19 | 期: | 20 | 起(迄)頁: | 19660-19667 | 來源出版物: | Optics Express | 摘要: | The discovery of single-molecule sensitivity via surface-enhanced Raman scattering on resonantly excited noble metal nanoparticles has brought an increasing interest in its applications to the molecule detection and identification. Periodic gold bowtie nanostructures have recently been shown to give a large enhancement factor sufficient for single molecule detection. In this work, we simulate the plasmon resonance for periodic gold bowtie nanostructures. The difference between the dipole and the quadrupole resonances is described by examining the magnitude and phase of electric field, the bound surface charge, and the polarization. The gap size dependence of the field enhancement can be interpreted by considering cavity field enhancement. Also, additional enhancement is obtained through the long-range collective photonic effect when the bowtie array periodicity matches the resonance wavelength. ? 2011 Optical Society of America. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/424837 | ISSN: | 10944087 | DOI: | 10.1364/OE.19.019660 |
顯示於: | 材料科學與工程學系 |
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