Manufacture of an optical prototype for light-matter interaction experiments
Keywords:Surface Plasmon polaritons, Additive manufacturing, Nanotechnology.
An optical prototype was fabricated to perform measurements of surface plasmon polaritons in light beams diffracted at angles of less than 900. Experiments were developed to identify the excitation resonant angle of surface polariton plasmons by a diffraction grating with a pitch greater than the wavelength of the light signal. In the laboratory tests, measurements of the intensity curve of the diffracted light signal were carried out in the +1 and -1 orders. The experimental results were consistent with the theoretical approach. Based on the above, it is concluded that it is possible to excite surface plasmon polaritons, using the technique of the metallic diffraction grating with a wavelength shorter than the space frequency of the grid. The achieved optical prototype turns out to be very flexible for future applications in the measurement of plasmons. This is possible thanks to the speed at which it is possible to modify the frames and their assemblies for the alignment of the optical elements: laser diode, rugged metallic surface, linear polarizer. Likewise, the absolute control in the incident angle apparatus, and the ease of exchanging the light source and the rough metal surface, open wide possibilities for testing new hypotheses for the excitation conditions of surface plasmon polaritons.
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Copyright (c) 2019 Miguel Ángel Ponce-Camacho, Jorge Alberto Villavicencio Aguilar, Roberto Romo Martínez
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