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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Trimodal Waveguide Demonstration and Its Implementation as a High Order Mode Interferometer for Sensing Application

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Ramirez, Jhonattan C. [1] ; Gabrielli, Lucas H. [2] ; Lechuga, Laura M. [3] ; Hernandez-Figueroa, Hugo E. [2]
Total Authors: 4
[1] Fed Univ Minas Gerais UFMG, Sch Engn, Dept Elect Engn, BR-31270901 Belo Horizonte, MG - Brazil
[2] Univ Campinas UNICAMP, Sch Elect & Comp Engn FEEC, BR-13083852 Campinas, SP - Brazil
[3] CSIC, BISTCIBER BBN, Catalan Inst Nanosci & Nanotechnol ICN2, Nanobiosensors & Bioanalyt Grp, Bellaterra 08193, Barcelona - Spain
Total Affiliations: 3
Document type: Journal article
Source: SENSORS; v. 19, n. 12 JUN 2 2019.
Web of Science Citations: 0

This work implements and demonstrates an interferometric transducer based on a trimodal optical waveguide concept. The readout signal is generated from the interference between the fundamental and second-order modes propagating on a straight polymer waveguide. Intuitively, the higher the mode order, the larger the fraction of power (evanescent field) propagating outside the waveguide core, hence the higher the sensitivity that can be achieved when interfering against the strongly confined fundamental mode. The device is fabricated using the polymer SU-8 over a SiO2 substrate and shows a free spectral range of 20.2 nm and signal visibility of 5.7 dB, reaching a sensitivity to temperature variations of 0.0586 dB/degrees C. The results indicate that the proposed interferometer is a promising candidate for highly sensitive, compact and low-cost photonic transducer for implementation in different types of sensing applications, among these, point-of-care. (AU)

FAPESP's process: 15/24517-8 - Photonics for next generation internet
Grantee:Hugo Enrique Hernández Figueroa
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 16/19270-6 - Multimode couplers for integrated photonics
Grantee:Lucas Heitzmann Gabrielli
Support Opportunities: Research Grants - Young Investigators Grants