Negative Role of Surface Plasmons in the Transmission of Metallic Gratings with Very Narrow Slits

Abstract

To cite this version:Qing Cao, Philippe Lalanne. Negative role of surface plasmons in the transmission of metallic gratings with very narrow slits

Transmission and reflection through 1D metallo-dielectric gratings of real metals under sub-wavelength condition

“…However, the transfer matrix formalism and the FDTD method are computationally very demanding [15]. In contrast, the RCWA and the EMA are the two closely related numerical techniques which are widely used to analyze 1D structures [2,3,5,6,8,16]. The RCWA expresses the dielectric function of the overall grating structure and the Electromagnetic (EM) field inside the grating region (−h ≤ z ≤ 0, see Fig.…”

“…Numerical approaches of modeling EOT devices include the transfer matrix formalism [1,5,10,11], the Finite Difference Time Domain (FDTD) method [9,12], the Rigorous Coupled Wave Analysis (RCWA) [3,6,8,13], and the Exact Modal Analysis (EMA) [14]. Both the transfer matrix and FDTD methods solve Maxwell's equations directly using grids and produce accurate results.…”

“…After the discovery of Extraordinary Optical Transmission (EOT) through 1D metallo-dielectric gratings, a number of efforts, both numerical and semianalytical, has been undertaken to understand the physics behind this exceptional phenomenon [1][2][3][4][5][6][7][8][9]. Numerical approaches of modeling EOT devices include the transfer matrix formalism [1,5,10,11], the Finite Difference Time Domain (FDTD) method [9,12], the Rigorous Coupled Wave Analysis (RCWA) [3,6,8,13], and the Exact Modal Analysis (EMA) [14].…”

Light circulation and weaving in periodically patterned structures

“…Numerous works have explained in detail the various optical and surface plasmon modes ͑SPs͒ that exist in these structures and their relative roles in producing the optical characteristics mentioned above. [9][10][11][12] Several works analyzed the relative roles of different types of SPs ͓i.e., horizontally oriented SPs ͑HSPs͒ on top and bottom air/metal interfaces, and coupled, vertically oriented SPs on the vertical walls of opposite sides of the grooves that undergo a Fabry-Perot resonance ͑VSP-CMs͔͒ in producing enhanced transmission and absorption. Most of the works concluded that VSP-CMs, Rayleigh anomalies and waveguide modes are the modes primarily responsible for these phenomena in 1D transmission gratings, not HSPs.…”

“…Most of the works concluded that VSP-CMs, Rayleigh anomalies and waveguide modes are the modes primarily responsible for these phenomena in 1D transmission gratings, not HSPs. [10][11][12] In fact, it has now been shown both theoretically 5 and experimentally 12 that enhanced transmission occurs just as strongly in 1D transmission gratings with light polarized with the electric field oriented parallel to the surfaces of the metal wires ͑i.e., s-polarized light͒, a polarization that does not excite SPs. Most of the research on phase resonances has been done on 1D periodic transmission and diffraction gratings with light polarized with the magnetic field oriented parallel to the metal wires ͑i.e., p-polarized light͒.…”