期刊
OPTICS EXPRESS
卷 19, 期 7, 页码 6541-6548出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.19.006541
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资金
- National Basic Research Program of China [2007CB935303]
- National Natural Science Foundation of China [11004119]
- Academy of Finland [128420]
- Academy of Finland (AKA) [128420, 128420] Funding Source: Academy of Finland (AKA)
A semi-circular plasmonic launcher integrated with dielectric-loaded surface plasmon-polaritons waveguide (DLSPPW) is proposed and analyzed theoretically, which can focus and efficiently couple the excited surface plasmon polaritons (SPPs) into the DLSPPW via the highly matched spatial field distribution with the waveguide mode in the focal plane. By tuning the incident angle or polarization of the illuminating beam, it is shown that the launcher may be conveniently used as a switch or a multiplexer that have potential applications in plasmonic circuitry. Furthermore, from an applicational point of view, it is analyzed how the coupling performance of the launcher can be further improved by employing multiple semi-circular slits. (C) 2011 Optical Society of America
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