期刊
OPTICS EXPRESS
卷 22, 期 3, 页码 3039-3044出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.22.003039
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资金
- Central Electronics Engineering Research Institute, Pilani, India
- Korea government (MSIP) [2009-0083512]
- World Class Institute (WCI) Program of the National Research Foundation of Korea (NRF)
- Ministry of Science, ICT and Future Planning (NRF) [WCI 2011-001]
- National Research Foundation of Korea (NRF)
- Engineering and Physical Sciences Research Council [EP/G060363/1] Funding Source: researchfish
- EPSRC [EP/G060363/1] Funding Source: UKRI
Metallic metamaterials with positive dielectric responses are promising as an alternative to dielectrics for the generation of Cerenkov radiation [J.-K. So et al., Appl. Phys. Lett. 97(15), 151107 (2010)]. We propose here by theoretical analysis a mechanism to couple out Cerenkov radiation from the slab surfaces in the transverse direction. The proposed method based on Brillouin-zone folding is to periodically modify the thickness of the metamaterial slab in the axial direction. Moreover, the intensity of the surface-coupled radiation by this mechanism shows an order-of-magnitude enhancement compared to that of ordinary Smith-Purcell radiation. (C) 2014 Optical Society of America
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