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Surface plasmons at the Brillouin zone boundary of an oblique lattice

T. J. Constant, P. Vukusic, A. P. Hibbins and J. R. Sambles Appl. Phys. Lett. 106, 091106 (2015) http://dx.doi.org/10.1063/1.4914479 In periodic systems of low-symmetry, the Bragg condition for the complete interference of waves along the contour of the Brillouin zone (BZ) boundary is not generally satisfied. As a result, band-gaps do not necessarily occur at this … Continue reading Surface plasmons at the Brillouin zone boundary of an oblique lattice

The calculation of the optical response of multilayer thin films

A little while ago (while avoiding my thesis), I wrote a small R package for the calculation of the optical response of multilayer thin films. It's called mlfilms and is avaliable on github. As a quick example, here is how you'd calculate and plot the reflection from a thin silver film through a prism. This … Continue reading The calculation of the optical response of multilayer thin films

Direct Mapping of Surface Plasmon Dispersion using Imaging Scatterometry

T. J. Constant, A. P. Hibbins, A. J. Lethbridge, J. R. Sambles, E. K. Stone, and P. Vukusic Appl. Phys. Lett. 102, 251107 (2013) http://dx.doi.org/10.1063/1.4812482 %5BPDF%5D The iso-frequency contours of diffracted surface plasmons on metallic bigratings have been directly recorded using imaging scatterometry. Metallic rectangular bigratings, formed of two “crossed” surface relief gratings, are used to demonstrate this measurement technique. By deepening one of the … Continue reading Direct Mapping of Surface Plasmon Dispersion using Imaging Scatterometry

Optical Excitation of Surface Plasmon Polaritons on Novel Bigratings

T. J. Constant Ph. D. Thesis (2013) http://hdl.handle.net/10871/9001 %5BPDF%5D This thesis details original experimental investigations in to the interaction of light with the mobile electrons at the surface of metallic diffraction gratings. The gratings used in this work to support the resultant trapped surface waves (surface plasmon polaritons), may be divided into two classes: ‘crossed’ bigratings … Continue reading Optical Excitation of Surface Plasmon Polaritons on Novel Bigratings

Surface Plasmons on Zigzag Gratings

T. J. Constant, T. Taphouse, H. J. Rance, S. C. Kitson, A. P. Hibbins, and J. R. Sambles Opt. Express 20, 23921-23926 (2012) http://dx.doi.org/10.1364/OE.20.023921 %5BPDF%5D Optical excitation of surface plasmons polaritons (SPPs) on a 'zig-zag diffraction grating' is explored. The fabricated silver grating consists of sub-wavelength grooves 'zig-zagged' along their length, providing a diffractive periodicity to visible … Continue reading Surface Plasmons on Zigzag Gratings