Aluminum Plasmonic Nanoantennas
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- 作者：Mark W. Knight ; Lifei Liu ; Yumin Wang ; Lisa Brown ; Shaunak Mukherjee ; Nicholas S. King ; Henry O. Everitt ; Peter Nordlander ; Naomi J. Halas
- 刊名：Nano Letters
- 出版年：2012
- 出版时间：November 14, 2012
- 年：2012
- 卷：12
- 期：11
- 页码：6000-6004
- 全文大小：363K
- 年卷期：v.12,no.11(November 14, 2012)
- ISSN：1530-6992
文摘
The use of aluminum for plasmonic nanostructures opens up new possibilities, such as access to short-wavelength regions of the spectrum, complementary metal鈥搊xide鈥搒emiconductor (CMOS) compatibility, and the possibility of low-cost, sustainable, mass-producible plasmonic materials. Here we examine the properties of individual Al nanorod antennas with cathodoluminescence (CL). This approach allows us to image the local density of optical states (LDOS) of Al nanorod antennas with a spatial resolution less than 20 nm and to identify the radiative modes of these nanostructures across the visible and into the UV spectral range. The results, which agree well with finite difference time domain (FDTD) simulations, lay the groundwork for precise Al plasmonic nanostructure design for a variety of applications.