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Article

Fluorescent Bulk Waveguide Sensor in Porous Glass: Concept, Fabrication, and Testing

1
Faculty of Laser Photonics and Optoelectronics, ITMO University, 197101 Saint Petersburg, Russia
2
School of Optical and Electronic Information, Huazhong University of Science & Technology, Luoyu Road 1037, Wuhan 430074, China
*
Author to whom correspondence should be addressed.
Nanomaterials 2020, 10(11), 2169; https://doi.org/10.3390/nano10112169
Received: 5 October 2020 / Revised: 23 October 2020 / Accepted: 26 October 2020 / Published: 30 October 2020
In this work, we suggest the new concept of sensing elements—bulk waveguides (BWGs) fabricated by the laser direct writing technique inside porous glass (PG). BWGs in nanoporous materials are promising to be applied in the photonics and sensors industries. Such light-guiding components interrogate the internal conditions of nanoporous materials and are able to detect chemical or physical reactions occurring inside nanopores especially with small molecules, which represent a separate class for sensing technologies. After the writing step, PG plates are impregnated with the indicator—rhodamine 6G—which penetrates through the nanoporous framework to the BWG cladding. The experimental investigation proved the concept by measuring the spectral characteristics of an output signal. We have demonstrated that the BWG is sensitive to ethanol molecules captured by the nanoporous framework. The sensitivity of the peak shift in the fluorescence spectrum to the refractive index of the solution is quantified as 6250 ± 150 nm/RIU. View Full-Text
Keywords: porous glass; sensor; waveguide; laser direct writing; rhodamine 6G; small molecules; ethanol; fluorescence porous glass; sensor; waveguide; laser direct writing; rhodamine 6G; small molecules; ethanol; fluorescence
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MDPI and ACS Style

Lijing, Z.; Zakoldaev, R.A.; Sergeev, M.M.; Veiko, V.P. Fluorescent Bulk Waveguide Sensor in Porous Glass: Concept, Fabrication, and Testing. Nanomaterials 2020, 10, 2169. https://doi.org/10.3390/nano10112169

AMA Style

Lijing Z, Zakoldaev RA, Sergeev MM, Veiko VP. Fluorescent Bulk Waveguide Sensor in Porous Glass: Concept, Fabrication, and Testing. Nanomaterials. 2020; 10(11):2169. https://doi.org/10.3390/nano10112169

Chicago/Turabian Style

Lijing, Zhong, Roman A. Zakoldaev, Maksim M. Sergeev, and Vadim P. Veiko. 2020. "Fluorescent Bulk Waveguide Sensor in Porous Glass: Concept, Fabrication, and Testing" Nanomaterials 10, no. 11: 2169. https://doi.org/10.3390/nano10112169

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