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Random nanostructured metallic films for environmental monitoring and optical sensing: experimental and computational studies.

Karbovnyk I, Collins J, Bolesta I, Stelmashchuk A, Kolkevych A, Velupillai S, Klym H, Fedyshyn O, Tymoshuk S, Kolych I - Nanoscale Res Lett (2015)

Bottom Line: Surface plasmon resonance-related phenomena are emphasized.Resonant optical absorption band changes due to the influence of noxious gases are investigated.Amplification of light at the film surface due to local electromagnetic field enhancement at the nanoscale is discussed based on finite difference time domain calculations.

View Article: PubMed Central - PubMed

Affiliation: Ivan Franko National University of Lviv, 1 Universytetska str, Lviv, 79000 Ukraine.

ABSTRACT
Nanostructured silver films are studied using computational and experimental methods. Surface plasmon resonance-related phenomena are emphasized. Resonant optical absorption band changes due to the influence of noxious gases are investigated. Amplification of light at the film surface due to local electromagnetic field enhancement at the nanoscale is discussed based on finite difference time domain calculations.

No MeSH data available.


Related in: MedlinePlus

Calculated local intensity normalized with respect to the incident intensity at different wavelengths.
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Fig3: Calculated local intensity normalized with respect to the incident intensity at different wavelengths.

Mentions: The calculated intensity maps (Figure 3) indicate that optical properties of films strongly depend on their local morphology. There are regions of the localization of strongly enhanced electromagnetic fields usually called ‘hot spots’ (brighter areas in Figure 3 correspond to the points where stronger enhancement is observed). This result is consistent with previous calculations performed in the frame of the DDA method using AFM images as initial data [15]. It is worth to be remarked that in the UV (250 nm), one observes a larger number of more intensive ‘hot spots’, while at 700 nm, the intensity is more evenly distributed with a smaller number of strongly enhanced regions.Figure 3


Random nanostructured metallic films for environmental monitoring and optical sensing: experimental and computational studies.

Karbovnyk I, Collins J, Bolesta I, Stelmashchuk A, Kolkevych A, Velupillai S, Klym H, Fedyshyn O, Tymoshuk S, Kolych I - Nanoscale Res Lett (2015)

Calculated local intensity normalized with respect to the incident intensity at different wavelengths.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4385309&req=5

Fig3: Calculated local intensity normalized with respect to the incident intensity at different wavelengths.
Mentions: The calculated intensity maps (Figure 3) indicate that optical properties of films strongly depend on their local morphology. There are regions of the localization of strongly enhanced electromagnetic fields usually called ‘hot spots’ (brighter areas in Figure 3 correspond to the points where stronger enhancement is observed). This result is consistent with previous calculations performed in the frame of the DDA method using AFM images as initial data [15]. It is worth to be remarked that in the UV (250 nm), one observes a larger number of more intensive ‘hot spots’, while at 700 nm, the intensity is more evenly distributed with a smaller number of strongly enhanced regions.Figure 3

Bottom Line: Surface plasmon resonance-related phenomena are emphasized.Resonant optical absorption band changes due to the influence of noxious gases are investigated.Amplification of light at the film surface due to local electromagnetic field enhancement at the nanoscale is discussed based on finite difference time domain calculations.

View Article: PubMed Central - PubMed

Affiliation: Ivan Franko National University of Lviv, 1 Universytetska str, Lviv, 79000 Ukraine.

ABSTRACT
Nanostructured silver films are studied using computational and experimental methods. Surface plasmon resonance-related phenomena are emphasized. Resonant optical absorption band changes due to the influence of noxious gases are investigated. Amplification of light at the film surface due to local electromagnetic field enhancement at the nanoscale is discussed based on finite difference time domain calculations.

No MeSH data available.


Related in: MedlinePlus