Electro-Optically Modulated Lossy-Mode Resonance-A New Approach for Label-Free Sensing
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F24%3A43908397" target="_blank" >RIV/60076658:12310/24:43908397 - isvavai.cz</a>
Result on the web
<a href="https://pubs.acs.org/doi/10.1021/acsphotonics.4c00215" target="_blank" >https://pubs.acs.org/doi/10.1021/acsphotonics.4c00215</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acsphotonics.4c00215" target="_blank" >10.1021/acsphotonics.4c00215</a>
Alternative languages
Result language
angličtina
Original language name
Electro-Optically Modulated Lossy-Mode Resonance-A New Approach for Label-Free Sensing
Original language description
In this work, we report studies on the impact of thin dielectric layer formation on the optical, electrochemical, and electro-optically modulated responses of an indium tin oxide (ITO)-coated optical fiber sensor. The properties of ITO, such as optical transparency, high refractive index, and electrochemical activity, make it possible to obtain a lossy-mode resonance (LMR) effect in the optical domain and simultaneously use the sensor as an electrode in the electrochemical domain. The dielectric layer has been obtained on the ITO surface with precision down to a single nanometer using the atomic layer deposition (ALD) method. It is considered a reference to forming a biological or chemical layer during label-free sensing applications of such dual-domain sensors. It has been found that the sensor responds in both optical and electrochemical domains to the formation of a coating on the ITO surface. Numerical and experimental studies have proven that there is also a strong impact of the dielectric layer on the electro-optical modulation effectiveness. Changes in ITO's refractive index and extinction coefficient at its interface with the layer are induced by the modulation of free charge carriers' density. It has been shown that changes in the thickness of the dielectric layer, down to tenths of nanometers, can be precisely monitored when modulation is applied. Such an attribute is hardly possible when standard optical measurements, i.e., without modulation are considered. The findings open new opportunities for using electro-optical modulation in label-free sensing and biosensing, especially when small biological species or their low concentrations are targeted.
Czech name
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Czech description
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Classification
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
21001 - Nano-materials (production and properties)
Result continuities
Project
<a href="/en/project/GF21-05030K" target="_blank" >GF21-05030K: Semitransparent titania nanostructures on complex geometry surfaces for enhanced light harvesting and sensing</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
ACS Photonics
ISSN
2330-4022
e-ISSN
2330-4022
Volume of the periodical
11
Issue of the periodical within the volume
5
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
2061-2069
UT code for WoS article
001226227900001
EID of the result in the Scopus database
2-s2.0-85192233780