Semiconductor-based plasmonic interferometers for ultrasensitive sensing in a terahertz regime

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27640%2F17%3A10236992" target="_blank" >RIV/61989100:27640/17:10236992 - isvavai.cz</a>
Alternative codes found
RIV/61989100:27740/17:10236992
Result on the web
<a href="https://www.osapublishing.org/ol/viewmedia.cfm?uri=ol-42-12-2338&seq=0" target="_blank" >https://www.osapublishing.org/ol/viewmedia.cfm?uri=ol-42-12-2338&seq=0</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1364/OL.42.002338" target="_blank" >10.1364/OL.42.002338</a>

Result language
angličtina
Original language name
Semiconductor-based plasmonic interferometers for ultrasensitive sensing in a terahertz regime
Original language description
A robust plasmonic semiconductor-based Mach-Zehnder interferometer (MZI), which consists of a semiconductor layer with a microslit flanked by two identical microgrooves, is proposed and investigated for the terahertz sensing. The microgrooves reflect the surface plasmon polariton waves toward the microslit, where they interfere with the transmitted terahertz wave. The interference pattern is determined by the permittivities of the sensing material and semiconductor (i.e., temperature dependent), making the structure useful for the refractive index (RI) and temperature detection. A quantitative theoretical model is also developed for performance prediction and validated with a finite element method. The numerical results show that the Mach-Zehnder interferometer sensor possesses an RI sensitivity as high as 140000 nm/RIU (or 0.42 THz/RIU) and a relative intensity sensitivity of 1200% RIU-1. In addition, a temperature sensitivity of 1470 nm/K (or 4.7 x 10(-3) THz/K) is determined. Theoretical calculations indicate that the further improvement in sensing performance is still possible through optimization of the structure. The proposed sensing scheme may pave the way for applications in terahertz sensing and integrated terahertz circuits. (C) 2017 Optical Society of America
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10306 - Optics (including laser optics and quantum optics)

Project
<a href="/en/project/GA15-21547S" target="_blank" >GA15-21547S: Characterization of magnetic nanostructures with optical techniques</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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