Effective refractive index determination of porous silicon based Distributed Bragg reflector for liquid sensor application

Authors

Arven I. Cafe ⋅ PH National Institute of Physics, University of the Philippines Diliman
Joybelle M. Lopez ⋅ PH National Institute of Physics, University of the Philippines Diliman
Lorenzo P. Lopez ⋅ PH National Institute of Physics, University of the Philippines Diliman
Arnel A. Salvador ⋅ PH National Institute of Physics, University of the Philippines Diliman
Armando S. Somintac ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

DBR based on porous silicon (DBR-PSi) was fabricated for liquid sensor application. Via reflectance spectroscopy, initial peak position and its shift upon the detection of ethanol and water were determined. Bruggeman effective medium approximation was employed to calculate the porosities and refractive indices of DBR-PSi samples with voids completely filled with air and liquid. It shows that shift in peak position (Δλ) corresponds to change in refractive index (Δn) upon detection. The Δn_min that can be detected was found to be smaller for case 1 than case 2 and dependent on samples porosity.

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Issue

2015: Proceedings of the 33rd Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP-2015-PB-24

Section

Poster Session PB

Published

2015-06-03

How to Cite

[1]

AI Cafe, JM Lopez, LP Lopez, AA Salvador, and AS Somintac, Effective refractive index determination of porous silicon based Distributed Bragg reflector for liquid sensor application, Proceedings of the Samahang Pisika ng Pilipinas 33, SPP-2015-PB-24 (2015). URL: https://proceedings.spp-online.org/article/view/1230.