Experimental demonstration of tunable refractometer based on orbital angular momentum of longitudinally structured light.

ABSTRACT: The index of refraction plays a decisive role in the design and classification of optical materials and devices; therefore, its proper and accurate determination is essential. In most refractive index (RI) sensing schemes, however, there is a trade-off between providing high-resolution measurements and covering a wide range of RIs. We propose and experimentally demonstrate a novel mechanism for sensing the index of refraction of a medium by utilizing the orbital angular momentum (OAM) of structured light. Using a superposition of co-propagating monochromatic higher-order Bessel beams with equally spaced longitudinal wavenumbers, in a comb-like setting, we generate non-diffracting rotating light structures in which the orientation of the beam's intensity profile is sensitive to the RI of th

SUBMITTER: Dorrah AH 

PROVIDER: S-EPMC6107032 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature