Nanofocusing of light using three-dimensional plasmonic mode conversion
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- Nanofocusing of light using three-dimensional plasmonic mode conversion
- An, Shinmo; Lee, Hyun-Shik; Jeong, Yong-Beom; Jun, Young Chul; Lee, Seung Gol; Park, Se-Guen; Lee, El-Hang; Beom-Hoan, O.
- NANOSTRIP WAVE-GUIDES; GAP; PROPAGATION; POLARITONS; DESIGN; SCALE; WEDGE
- Issue Date
- OPTICAL SOC AMER
- OPTICS EXPRESS, v.21, no.23, pp.27816 - 27825
- Efficient nanofocusing of light into a gap plasmon waveguide using three-dimensional mode conversion in a strip plasmonic directional coupler is proposed. Unlike conventional nanofocusing using tapering structures, a plasmonic directional coupler converts E-z-type odd mode energy into E-y-type gap plasmon mode by controlling phase mismatch and gap spacing. The simulation result shows the maximum electric field intensity increases up to 58.1 times the input intensity, and 17.3% of the light is focused on the nano gap region. (C) 2013 Optical Society of Americ
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