期刊
NANO LETTERS
卷 15, 期 5, 页码 3585-3589出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b01076
关键词
Metasurfaces; surface plasmons; holography; metalens
类别
资金
- Harvard Nanoscale Science and Engineering Center (NSEC) [NSF/PHY 06-46094]
- Center for Nanoscale Systems (CNS) at Harvard University, a member of the National Nanotechnology Infrastructure Network (NNIN)
- National Science Foundation Early concept Grant for Exploratory Research [ECCS-1347251]
- Air Force Office of Scientific Research [FA9550-12-1-0289]
Surface plasmons polaritons (SPPs) are light like waves confined to the interface between a metal and a dielectric. Excitation and control of these modes requires components such as couplers and lenses. We present the design of a new lens based on holographic principles. The key feature is the ability to switchably control SPP focusing by changing either the incident wavelength or polarization. Using phase-sensitive near-field imaging of the surface plasmon wavefronts, we have observed their switchable focusing and steering as the wavelength or polarization is changed.
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