Bidimensional near-field sampling spectrometry

Abstract : We report on a concept of compact optical Fourier-transform spectrometer based on bidimensional (2D) spatial sampling of a confined interferogram. The spectrometer consists of a nanostructured glass surface on which two light beams interfere in total internal reflection. Subwavelength spatial sampling of the interferogram near field is achieved by introducing a tilt angle between a 2D array of optical nanoantennas and the interferogram pattern. The intensity distribution of the scattered light is recorded on a 2D CCD camera, and a one-dimensional Fourier transform of the interferogram is used to recover the input light spectrum. Experimental results show a wide spectral bandwidth in the visible range, down to 380nm, with spectral resolution of 1.6nm around 780nm.
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Submitted on : Wednesday, September 25, 2019 - 11:49:32 AM
Last modification on : Thursday, September 26, 2019 - 1:26:06 AM

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Mikael Renault, Yassine Hadjar, Sylvain Blaize, Aurélien Bruyant, Laurent Arnaud, et al.. Bidimensional near-field sampling spectrometry. Optics Letters, Optical Society of America, 2010, 35 (19), pp.3303. ⟨10.1364/OL.35.003303⟩. ⟨hal-02296523⟩

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