TiO2 surface functionalization of COC based planar waveguide Bragg gratings for refractive index sensing

Rosenberger M, Girschikofsky M, Förthner M, Belle S, Rommel M, Frey L, Schmauß B, Hellmann R (2018)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2018

Journal

Journal of Optics Institute of Physics: Hybrid Open Access

Publisher: Institute of Physics Publishing

Book Volume: 20

Article Number: 01LT02

Journal Issue: 1

DOI: 10.1088/2040-8986/aa9bcf

Abstract

We demonstrate the applicability of a planar waveguide Bragg grating in cyclo-olefin copolymer (COC) for refractive index sensing. The polymer planar waveguide Bragg grating fabricated using a single writing step technique is coated with a high-index layer of titanium dioxide (TiO2) leading to a distinct birefringence. This in turn results in the splitting of the Bragg reflection into two distinct Bragg wavelengths, which strongly differ regarding their refractive index sensitivities. Where one wavelength is only slightly affected by the ambient refractive index, the second Bragg peak shows a strong sensitivity. Furthermore, we investigate the temperature behaviour of the functionalized sensor and discuss it with respect to applications in refractive index sensing.

Authors with CRIS profile

Manuel Rosenberger Professur für Hochfrequenztechnik mit dem Schwerpunkt Optische Hochfrequenztechnik und Photonik Michael Förthner Lehrstuhl für Elektronische Bauelemente Lothar Frey Lehrstuhl für Elektronische Bauelemente Bernhard Schmauß Professur für Hochfrequenztechnik mit dem Schwerpunkt Optische Hochfrequenztechnik und Photonik

Involved external institutions

Fraunhofer-Institut für Integrierte Systeme und Bauelementetechnologie (IISB) DE Germany (DE) Hochschule Aschaffenburg DE Germany (DE)

How to cite

APA:

Rosenberger, M., Girschikofsky, M., Förthner, M., Belle, S., Rommel, M., Frey, L.,... Hellmann, R. (2018). TiO2 surface functionalization of COC based planar waveguide Bragg gratings for refractive index sensing. Journal of Optics, 20(1). https://dx.doi.org/10.1088/2040-8986/aa9bcf

MLA:

Rosenberger, Manuel, et al. "TiO2 surface functionalization of COC based planar waveguide Bragg gratings for refractive index sensing." Journal of Optics 20.1 (2018).

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