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Article Dans Une Revue Optics Express Année : 2016

Structured surface reflector design for oblique incidence beam splitter at 610 GHz

Résumé

An iterative alternate projection-based algorithm is developed to design structured surface reflectors to operate as beam splitters at GHz and THz frequencies. To validate the method, a surface profile is determined to achieve a reflector at 610 GHz that generates four equal-intensity beams towards desired directions of ±12.6° with respect to the specular reflection axis. A prototype is fabricated and the beam splitter behavior is experimentally demonstrated. Measurements confirm a good agreement (within 1%) with computer simulations using Feko, validating the method. The beam splitter at 610 GHz has a measured efficiency of 78% under oblique incidence illumination that ensures a similar intensity between the four reflected beams (variation of about 1%).
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Dates et versions

hal-01360075 , version 1 (12-09-2016)

Identifiants

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Fabien Defrance, Massimiliano Casaletti, Julien Sarrazin, Martina Wiedner, Hugh Gibson, et al.. Structured surface reflector design for oblique incidence beam splitter at 610 GHz. Optics Express, 2016, 24 (18), pp.20335 - 20345. ⟨10.1364/OE.24.020335⟩. ⟨hal-01360075⟩
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