Open AccessHolographic grating based high sensitivity device for refractive index measurements
Author(s) -
Domenico Donisi,
Roberto Caputo,
Giovanni Cennini
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.015236
Subject(s) - optics , refractive index , materials science , diffraction efficiency , grating , holography , prism , sensitivity (control systems) , diffraction grating , diffraction , optoelectronics , physics , electronic engineering , engineering
In this communication, we show how a short-pitch diffractive structure can be used as a low-cost high sensitivity device for refractive index measurements with sensitivity of 10(-2). The device consists of a photo-resist diffraction grating put in optical contact with a hollow prism used as a container for a test material. Its main advantage is the possibility to monitor the composition of solids, fluids and gases in real time. Knowledge of optical parameters of a system with high accuracy can be vital when working in the biological/medical field.