Plasmonic semiconductor-based interferometers for ultrasensitive THz biosensing

Plasmonic semiconductor-based interferometers for ultrasensitive THz biosensing

A novel plasmonic Mach-Zehnder interferometer (MZI) biosensor, which is based on a simple slit-groove microstructure, is reported in the terahertz (THz) regime. The permittivity-sensitive phase difference between the two propagating SPPs waves gives rise to the modulation of the transmitted intensit...

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Bibliographic Details
Published in:2017 IEEE International Conference on Computational Electromagnetics (ICCEM) pp. 295 - 296
Main Authors: Youqiao Ma, Alattar, Yousef, Eldlio, Mohamed, Nghia Nguyen-Huu, Cada, Michael, Maeda, Hiroshi
Format: Conference Proceeding
Language:English
Published: IEEE 01-03-2017
Subjects:
Biosensing
Biosensors
Interference
Interferometer
Interferometers
Plasmons
Refractive index
Semicondutors
Surface plasmon
Surface waves
Terahertz technique
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Summary:A novel plasmonic Mach-Zehnder interferometer (MZI) biosensor, which is based on a simple slit-groove microstructure, is reported in the terahertz (THz) regime. The permittivity-sensitive phase difference between the two propagating SPPs waves gives rise to the modulation of the transmitted intensity. The results show that the MZI biosensor possesses a sensitivity as high as 140000 nm/RIU (refractive index unit). The highly compact configuration may find important applications in areas of sensing and integrated THz circuits (ITCs).
DOI:10.1109/COMPEM.2017.7912797