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Designing multilayer dielectric filter based on TiO2/SiO2 for fluorescence microscopy applications

Hanh Hong Mai  1

1 Faculty of Physics, VNU University of Science,

334 Nguyen Trai, Hanoi, Vietnam

 PDF, 996 kB

DOI: 10.18287/2412-6179-CO-618

Pages: 209-213.

Full text of article: English language.

Abstract:
This study presents a new construction design of a distributed Bragg reflector (DBR) filter and a Fabry–Pérot (FP) filter by using needle technique as a synthesis method. The optimized DBR and FP filters having a proper number of layers with controlling thickness TiO2/SiO2 are utilized to transmit only a certain narrow band of wavelengths while blocking the others. As a proof of concept, the filters are designed to selectively transmit only a very narrow band of wavelength at 780 nm which is the near infrared (NIR) fluorescent emission from Alexa Fluor 750 dye. The obtained results show that the optimized filters represent advanced spectral performance which can be used to improve the sensitivity and the imaging contrast in fluorescence microscopy.

Keywords:
Bragg reflectors, DBR filter, Fabry–Perot, Fabry–Pérot filter, thin film, thin film deposition, Needle method.

Citation:
Mai HH. Designing multilayer dielectric filter based on TiO2/SiO2 for fluorescence microscopy applications. Computer Optics 2020; 44(2): 209-213. DOI: 10.18287/2412-6179-CO-618.

Acknowledgements:
This research was supported by the International Centre for Genetic Engineering and Biotechnology (ICGEB) through a grant to Dr. Hanh Hong Mai. Grant NO. CRP/VNM17-03.

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