期刊
OPTICS EXPRESS
卷 23, 期 24, 页码 30730-30738出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.23.030730
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资金
- EPSRC (UK)
- ERC iPLASMM project [321268]
- US Army Research Office [W911NF-12-1-0533, W911NF-13-1-0282]
- Royal Society
- Wolfson Foundation
- EC [304179]
- EPSRC [EP/H000917/2, EP/J018457/1, EP/J015393/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/J018457/1, EP/J015393/1, EP/H000917/2] Funding Source: researchfish
The detection and processing of information carried by evanescent field components are key elements for subwavelength optical microscopy as well as single molecule sensing applications. Here, we numerically demonstrate the potential of a hyperbolic medium in the design of an efficient metamaterial antenna enabling detection and tracking of a nonlinear object, with an otherwise hidden second-harmonic signature. The presence of the antenna provides 10(3)-fold intensity enhancement of the second harmonic generation (SHG) from a nanoparticle through a metamaterial-assisted access to evanescent second-harmonic fields. Alternatively, the observation of SHG from the metamaterial itself can be used to detect and track a nanoparticle without a nonlinear response. The antenna allows an optical resolution of several nanometers in tracking the nanoparticle's location via observations of the far-field second-harmonic radiation pattern. (c) 2015 Optical Society of America
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