Rainbow field enhancement in graded groove arrays: design and fabrication (IMAGE)
Caption
Spectral (a-c) and spatial (d-f) field profiles of groove arrays with gradients in (a,d) groove-length, (b,e) groove-width and (c,f) both groove-length and groove width. Each gradient design produces broadband field enhancement with the spatial and spectral profiles determined by the geometries of the comprising grooves. (g-h) SEM images of the nanoscale metal-dielectric-metal grooves with a minimum groove width of 5 nm, allowing for extreme light concentration.
Credit
by Nazir Kherani
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