Abstract

We present the preparation and characteristics of liquid-phase sensors based on nano-porous silicon multilayer structures for determination of organic content in gasoline. The principle of the sensor is a determination of the cavity-resonant wavelength shift caused by refractive index change of the nano-porous silicon multilayer cavity due to the interaction with liquids. We use the transfer matrix method (TMM) for the design and prediction of characteristics of microcavity sensors based on nano-porous silicon multilayer structures. The preparation process of the nano-porous silicon microcavity is based on electrochemical etching of single-crystal silicon substrates, which can exactly control the porosity and thickness of the porous silicon layers. The basic characteristics of sensors obtained by experimental measurements of the different liquids with known refractive indices are in good agreement with simulation calculations. The reversibility of liquid-phase sensors is confirmed by fast complete evaporation of organic solvents using a low vacuum pump. The nano-porous silicon microcavity sensors can be used to determine different kinds of organic fuel mixtures such as bio-fuel (E5), A92 added ethanol and methanol of different concentrations up to 15%.

© 2013 Optical Society of Korea

Smart optical sensors for chemical substances based on porous silicon technology

Luca De Stefano, Ivo Rendina, Luigi Moretti, Stefania Tundo, and Andrea Mario Rossi
Appl. Opt. 43(1) 167-172 (2004)

Vertical multilayer structures based on porous silicon layers for mid-infrared applications

Maxime Duris, Mohammed Guendouz, Nathalie Lorrain, Parastesh Pirasteh, Loïc Bodiou, Warda Raiah, Yannick Coffinier, Vincent Thomy, and Joël Charrier
Opt. Mater. Express 10(8) 1921-1930 (2020)

Experimental study of the sensitivity of a porous silicon ring resonator sensor using continuous in-flow measurements

Raffaele Caroselli, Salvador Ponce-Alcántara, Francisco Prats Quilez, David Martín Sánchez, Luis Torrijos Morán, Amadeu Griol Barres, Laurent Bellieres, Hanna Bandarenka, Kseniya Girel, Vitaly Bondarenko, and Jaime García-Rupérez
Opt. Express 25(25) 31651-31659 (2017)

Spectrometer-free biological detection method using porous silicon microcavity devices

Peng Li, Zhenhong Jia, Xiaoyi Lü, Yajun Liu, Xuefei Ning, Jiaqing Mo, and Jiajia Wang
Opt. Express 23(19) 24626-24633 (2015)

Localized defect modes in dual-periodical multilayer structures based on porous silicon

K. Pérez, J. O. Estevez, A. Méndez-Blas, and J. Arriaga
J. Opt. Soc. Am. B 29(4) 538-542 (2012)