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001-es BibID:	BIBFORM119916
035-os BibID:	(WoS)000860975600004 (Scopus)85138187713 (cikkazonosító)154770
Első szerző:	Kalas Benjámin
Cím:	Scanning-resonance optical sensing based on a laterally graded plasmonic layer-optical properties of AgxAl1-x in the range of x=0 to 1 / Benjamin Kalas, György Sáfrán, Miklós Serényi, Miklós Fried, Péter Petrik
Dátum:	2022
ISSN:	0169-4332
Megjegyzések:	Plasmonic AgAl/Si3N4 sensor layer structure was deposited on a fused silica glass slide by dual DC magnetron sputtering. The composition of the AgxAl1?x layer was laterally graded in which x linearly changes from x=0 to x=1 over a distance of 20 mm. The Si3N4 layer serves both as a resonator and a protective layer providing homogeneous chemical properties on top of the inhomogeneous AgAl layer. The structure was illuminated through a hemi-cylinder for variable-angle measurements in the Kretschmann?Raether configuration using a focused spot that enabled the change of x by moving it along the gradient of the composition. Optical properties of AgxAl1?x in the whole composition range were obtained. The positions of resonant peaks were shifted by changing the angle of incidence and the lateral position of the spot in a flow-cell configuration. The optical sensing performance of the bilayer system was investigated for x=0 and x=1. Based on the capabilities of ellipsometry limit of detection in refractive index unit values of ?4?8?10?6 can be achieved in the resonant positions utilizing both p- and s-polarizations. Due to the flexible tunability of the resonant wavelengths by moving a focused spot, the above sensitivity is available in-situ, over the spectral range of 265-1504 nm.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Combinatorial material science Spectroscopic ellipsometry Plasmonics Biosensing
Megjelenés:	Applied Surface Science. - 606 (2022), p. 1-12. -
További szerzők:	Sáfrán György Serényi Miklós Fried Miklós Petrik Péter
Pályázati támogatás:	K131515 OTKA K129009 OTKA TKP2021-EGA04 Egyéb
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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