Bidimensional near-field sampling spectrometry.
Opt Lett
; 35(19): 3303-5, 2010 Oct 01.
Article
em En
| MEDLINE
| ID: mdl-20890367
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 380 nm, with spectral resolution of 1.6 nm around 780 nm.
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01-internacional
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MEDLINE
Idioma:
En
Ano de publicação:
2010
Tipo de documento:
Article