This article is cited in 6 papers

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Designing multilayer dielectric filter based on TiO$_2$/SiO$_2$ for fluorescence microscopy applications

H. Mai

Faculty of Physics, VNU University of Science, 334 Nguyen Trai, Hanoi, Vietnam

Abstract: This study presents a new construction design of a distributed Bragg reflector (DBR) filter and a Fabry–Perot (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 TiO${_2}$/SiO${_2}$ 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.

Received: 13.08.2019
Accepted: 14.01.2020

Language: English

DOI: 10.18287/2412-6179-CO-618