Design of an optical water pollution sensor using a single-layer guided-mode resonance filter

Abstract

The optical characteristics of a simple, planar, single layer, dielectric Mg-based guided mode resonance filter (GMRF) were investigated by means of rigorous-coupled wave analysis (RCWA). This filter has great potential for real-life applications, especially as bio- and environmental sensors. The structure of the proposed sensor is compact, and all of its layers can be grown in a single process. In this paper, we present results on the design of a water pollution sensor in the violet region of the visible spectrum. The spectral and angular sensitivities of the sensor for both the transverse electric (TE) and transverse magnetic (TM) polarization modes were estimated and compared for various regions in the violet spectrum. A spectral response characterized with a narrow bandwidth and low reflection side bands was realized by carrying out extensive parameter search and optimization. Optimal spectral and angular sensitivities were found for the sensor with a grating thickness of 100 nm in the TM polarized mode where we found them to be 100 nm and 40 degrees, per index refraction unit, respectively.

Keywords

Diffractive optics / guided waves / filters / sensors / spectral sensitivity / angular sensitivity

References

[1] Fujiwara Y, Matsuda H, Sato K, Jimbo M, Kobayashi T. Magnetoresistance and electronic structure of granular films with MgO or MgF2 matrices. Journal of Physics: Conference Series, 2011, 266(1): 012087

[2] Denlinger E J, Fathy A, Kalokitis D, Pendrick V, Thaler B. High performance YBCO films. Report for 25 May–25 August 1994, 1994 1-13.

[3] Wang S S, Magnusson R. Theory and applications of guided-mode resonance filters. Applied Optics, 1993, 32(14): 2606-2613.

[4] Wang S S, Magnusson R, Bagby J S, Moharam M G. Guided-mode resonances in planar dielectric-layer diffraction gratings. Journal of the Optical Society of America A, 1990, 7(8): 1470-1474.

[5] Clausnitzer T, Tishchenko A V, Kley E, Fuchs H, Schelle D, Parriaux O, . Narrowband, polarization-independent free-space wave notch filter. Journal of the Optical Society of America A, 2005, 22(12): 2799-2803.

[6] Destouches N, Tishchenko A, Pommier J, Reynaud S, Parriaux O, Tonchev S, . 99% efficiency measured in the −1st order of a resonant grating. Optics Express, 2005, 13(9): 3230-3235.

[7] Wang S S, Magnusson R. Multilayer waveguide-grating filters. Applied Optics, 1995, 34(14): 2414-2420.

[8] Magnusson R, Wang S S. New principle for optical filters. Applied Physics Letters, 1992, 61(9): 1022-1024.

[9] Klimov M S, Sychugov V A, Tishchenko A V, Parriaux O. Optimization of optical waveguide grating couplers. Fiber and Integrated Optics, 1992, 11(1): 85-90.

[10] Sharon A, Rosenblatt D, Friesem A A, Weber H G, Engel H, Steingrueber R. Light modulation with resonant grating-waveguide structures. Optics Letters, 1996, 21(19): 1564-1566.

[11] Katchalski T, Yurista G L, Friesem A, Martin G, Hierle R, Zyss J. Light modulation with electro-optic polymer-based resonant grating waveguide structures. Optics Express, 2005, 13(12): 4645-4650.

[12] Cunningham B, Li P, Lin B, Pepper J. Colorimetric resonant reflection as a direct biochemical assay technique. Sensors and Actuators B: Chemical, 2002, 81(2–3): 316-328.

[13] Abdulhalim I. Bock W J, Gannot I, Tanev S. Biosensing configurations using guided wave resonant structures. Optical waveguide sensing and imaging (proceedings of the NATO Advanced Study Institute on Optical Waveguide Sensing and Imaging in Medicine, Environment, Security and Defence, Gatineau, Québec, Canada, October 12–21, 2006), 2008, Netherlands: Springer Netherlands, 211-228.

[14] Abdulhalim I. Optimized guided mode resonant structure as thermooptic sensor and liquid crystal tunable filter. Chinese Optics Letters, 2009, 7(8): 667-670.

[15] Fang Y, Ferrie A M, Fontaine N H, Mauro J, Balakrishnan J. Resonant waveguide grating biosensor for living cell sensing. Biophysical Journal, 2006, 91(5): 1925-1940.

[16] Parriaux O, Veldhuis G J. Normalized analysis for the sensitivity optimization of integrated optical evanescent-wave sensors. Journal of Lightwave Technology, 1998, 16(4): 573-582.

[17] Wawro D D, Tibuleac S, Magnusson R, Liu H. Optical fiber endface biosensor based on resonances in dielectric waveguide gratings. BiOS 2000 The International Symposium on Biomedical Optics, 2000, San Jose: CA International Society for Optics and Photonics

[18] Collin R E. Field theory of guided waves, 1991, New York: IEEE Press

[19] Moharam M G, Pommet D A, Grann E B, Gaylord T K. Stable implementation of the rigorous coupled-wave analysis for surface-relief gratings: enhanced transmittance matrix approach. Journal of the Optical Society of America A, 1995, 12(5): 1077-1086.

[20] Rathge H. MRCWA — multilayer rigorous coupled wave analysis, 2010

[21] Filmetrics Inc., “Filmetrics index of refraction database,” available from: http://www.filmetrics.com/refractive-index-database.