Bloch Surface Wave Resonance Based Sensors as an Alternative to Surface Plasmon Resonance Sensors

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27240%2F20%3A10246158" target="_blank" >RIV/61989100:27240/20:10246158 - isvavai.cz</a>

Result on the web

<a href="https://www.mdpi.com/1424-8220/20/18/5119" target="_blank" >https://www.mdpi.com/1424-8220/20/18/5119</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/s20185119" target="_blank" >10.3390/s20185119</a>

Result language

angličtina

Original language name

Bloch Surface Wave Resonance Based Sensors as an Alternative to Surface Plasmon Resonance Sensors

Original language description

We report on a highly sensitive measurement of the relative humidity (RH) of moist air using both the surface plasmon resonance (SPR) and Bloch surface wave resonance (BSWR). Both resonances are resolved in the Kretschmann configuration when the wavelength interrogation method is utilized. The SPR is revealed for a multilayer plasmonic structure of SF10/Cr/Au, while the BSWR is resolved for a multilayer dielectric structure (MDS) comprising four bilayers of TiO2/SiO2with a rough termination layer of TiO2. The SPR effect is manifested by a dip in the reflectance of ap-polarized wave, and a shift of the dip with the change in the RH, or equivalently with the change in the refractive index of moist air is revealed, giving a sensitivity in a range of 0.042-0.072 nm/%RH. The BSWR effect is manifested by a dip in the reflectance of the spectral interference ofs- andp-polarized waves, which represents an effective approach in resolving the resonance with maximum depth. For the MDS under study, the BSWRs were resolved within two band gaps, and for moist air we obtained sensitivities of 0.021-0.038 nm/%RH and 0.046-0.065 nm/%RH, respectively. We also revealed that the SPR based RH measurement is with the figure of merit (FOM) up to 4.7 x 10(-4)%RH-1, while BSWR based measurements have FOMs as high as 3.0 x 10-3%RH-1and 1.1 x 10(-3)%RH-1, respectively. The obtained spectral interferometry based results demonstrate that the BSWR based sensor employing the available MDS has a similar sensitivity as the SPR based sensor, but outperforms it in the FOM. BSW based sensors employing dielectrics thus represent an effective alternative with a number of advantages, including better mechanical and chemical stability than metal films used in SPR sensing.

Czech name

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Czech description

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Type

J_imp - 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

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Sensors

ISSN

1424-3210

e-ISSN

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Volume of the periodical

20

Issue of the periodical within the volume

18

Country of publishing house

CH - SWITZERLAND

Number of pages

17

Pages from-to

"5119(1)"-"5119(17)"

UT code for WoS article

000580711900001

EID of the result in the Scopus database

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