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16 March 2015 Simulating the focusing of light onto 1D nanostructures with a B-spline modal method
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Abstract
Focusing the light onto nanostructures thanks to spherical lenses is a first step to enhance the field, and is widely used in applications, in particular for enhancing non-linear effects like the second harmonic generation. Nonetheless, the electromagnetic response of such nanostructures, which have subwavelength patterns, to a focused beam can not be described by the simple ray tracing formalism. Here, we present a method to compute the response to a focused beam, based on the B-spline modal method. The simulation of a gaussian focused beam is obtained thanks to a truncated decomposition on plane waves computed on a single period, which limits the computation burden.
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P. Bouchon, P. Chevalier, S. Héron, F. Pardo, J.-L. Pelouard, and R. Haïdar "Simulating the focusing of light onto 1D nanostructures with a B-spline modal method", Proc. SPIE 9357, Physics and Simulation of Optoelectronic Devices XXIII, 935715 (16 March 2015); https://doi.org/10.1117/12.2078342
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