期刊
NATURE COMMUNICATIONS
卷 9, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-018-07869-5
关键词
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资金
- H2020 European Research Council Project [734578, 648783]
- Leverhulme Trust [RPG-2012-674]
- Royal Society
- Wolfson Foundation
- Engineering and Physical Sciences Research Council [EP/J018473/1]
- National Natural Science Foundation of China [11604161]
- Jiangsu Provincial Natural Science Foundation [BK20160914]
- Natural Science Foundation of the Jiangsu Higher Education Institutions of China [16KJB140009]
- Natural Science Foundation of Nanjing University of Posts and Telecommunications [NY216012]
- European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie Grant [752102]
- KAUST [OSR-2016-CRG5-2995]
- EPSRC [EP/J018473/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/J018473/1] Funding Source: researchfish
- Marie Curie Actions (MSCA) [752102] Funding Source: Marie Curie Actions (MSCA)
- European Research Council (ERC) [648783] Funding Source: European Research Council (ERC)
Engineering hotspots is of crucial importance in many applications including energy harvesting, nano-lasers, subwavelength imaging, and biomedical sensing. Surface-enhanced Raman scattering spectroscopy is a key technique to identify analytes that would otherwise be difficult to diagnose. In standard systems, hotspots are realised with nanostructures made by acute tips or narrow gaps. Owing to the low probability for molecules to reach such tiny active regions, high sensitivity is always accompanied by a large preparation time for analyte accumulation which hinders the time response. Inspired by transformation optics, we introduce an approach based on warped spaces to manipulate hotspots, resulting in broadband enhancements in both the magnitude and volume. Experiments for single molecule detection with a fast soaking time are realised in conjunction with broadband response and uniformity. Such engineering could provide a new design platform for a rich manifold of devices, which can benefit from broadband and huge field enhancements.
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