title: Surface-coupling of Cerenkov radiation from a modified metallic metamaterial slab via Brillouin-band folding.
abstract: 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.
authors.forename: Anirban
authors.initials: A
authors.lastname: Bera
authors.forename: Ranjan Kumar
authors.initials: RK
authors.lastname: Barik
authors.forename: Matlabjon
authors.initials: M
authors.lastname: Sattorov
authors.forename: Ohjoon
authors.initials: O
authors.lastname: Kwon
authors.forename: Sun-Hong
authors.initials: SH
authors.lastname: Min
authors.forename: In-Keun
authors.initials: IK
authors.lastname: Baek
authors.forename: Seontae
authors.initials: S
authors.lastname: Kim
authors.forename: Jin-Kyu
authors.initials: JK
authors.lastname: So
authors.forename: Gun-Sik
authors.initials: GS
authors.lastname: Park