期刊
APPLIED PHYSICS LETTERS
卷 112, 期 17, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.5024433
关键词
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资金
- National Natural Science Foundation of China (NSFC) [11574001, 11774116, 61761130082, 11274131, 61222502]
- National Basic Research Program of China (973 Program) [2014CB340004]
- Royal Society-Newton Advanced Fellowship
- National Program for Support of Top-notch Young Professionals
- Yangtze River Excellent Young Scholars Program
- Program for HUST Academic Frontier Youth Team
Mid-infrared (2-20 mu m) light has been attracting great attention in many areas of science and technology. Beyond the extended wavelength range from visible and near-infrared to mid-infrared, shaping spatial structures may add opportunities to grooming applications of mid-infrared photonics. Here, we design and fabricate a reflection-enhanced plasmonic metasurface and demonstrate efficient generation of structured light with the phase helix and intensity helix at 2 mu m. This work includes two distinct aspects. First, structured light (phase helix, intensity helix) generation at 2 mu m, which is far beyond the ability of conventional spatial light modulators, is enabled by the metasurface with sub-wavelength engineered structures. Second, the self-referenced intensity helix against environmental noise is generated without using a spatially separated light. The demonstrations may open up advanced perspectives to structured light applications at 2 mu m, such as phase helix for communications and non-communications (imaging, sensing) and intensity helix for enhanced microscopy and advanced metrology. Published by AIP Publishing.
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