Extraordinary Transmission and Enhanced Emission with Metallic Gratings Having Converging-Diverging Channels

Microfluidic converging/diverging channels optimised for homogeneous extensional deformation

In this work, we optimise microfluidic converging/diverging geometries in order to produce constant strain-rates along the centreline of the flow, for performing studies under homogeneous extension. The design is examined for both two-dimensional and three-dimensional flows where the effects of aspect ratio and dimensionless contraction length are investigated. Initially, pressure driven flows ...

Extraordinary IR transmission with metallic arrays of subwavelength holes.

Transmission resonances in plasmonic metallic gratings

G. D’Aguanno,* N. Mattiucci, M. J. Bloemer, D. de Ceglia, M. A. Vincenti, and A. Alù AEgis Tech. Microsystems/Nanotechnology, 410 Jan Davis Drive, Huntsville, Alabama 35806, USA Department of the Army, Charles M. Bowden Facility, Building 7804, Research Development and Engineering Command, Redstone Arsenal, Alabama 35898, USA Department of Electrical and Computer Engineering, University of Texa...

Extraordinary transmission through subwavelength dielectric gratings in the microwave range.

We address the problem of the transmission through subwavelength dielectric gratings. Following Maurel et al. [Phys. Rev. B 88, 115416 (2013)], the problem is reduced to the transmission by an homogeneous slab, either anisotropic (for transverse magnetic waves, TM) or isotropic (for transverse electric waves, TE), and an explicit expression of the transmission coefficient is derived. The optimu...

Loss mechanisms in mid-infrared extraordinary optical transmission gratings.

The optical properties of periodic arrays of subwavelength apertures in metal films on GaAs substrates are studied. Specifically, geometric and material losses for these plasmonic structures are characterized using angular dependent transmission, normal incidence reflection, and angular dependent diffraction experiments, in addition to a crossed-polarizer transmission experiment. The optical pr...