2000
DOI: 10.1209/epl/i2000-00504-y
|View full text |Cite
|
Sign up to set email alerts
|

Quenching and enhancement of single-molecule fluorescence under metallic and dielectric tips

Abstract: We report on fluorescence experiments by apertureless near-field optical microscopy. We develop a simple model that demonstrates the importance of non-radiative transfer and that takes into account the dependence of non-radiative transfer on tip geometry. This process is in competition with field enhancement and it is a key process to understand the observed fluorescence enhancement factors. The analysis of the different factors involved in the global fluorescence enhancement or quenching leads to new strategi… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
3

Citation Types

0
53
0
1

Year Published

2004
2004
2017
2017

Publication Types

Select...
4
4

Relationship

0
8

Authors

Journals

citations
Cited by 65 publications
(54 citation statements)
references
References 15 publications
0
53
0
1
Order By: Relevance
“…Previous investigations did not attain the level of precision necessary to differentiate between various theoretical models [4,7,14] and there was no experimental or theoretical consensus regarding either the functionality or the set of parameters governing the spatial confinement [12,[15][16][17][18]. In this Letter, we show unambiguously that the enhancement decays strictly according to a power-law functionality moderated by a single parameter that characterizes the tip sharpness.…”
mentioning
confidence: 51%
“…Previous investigations did not attain the level of precision necessary to differentiate between various theoretical models [4,7,14] and there was no experimental or theoretical consensus regarding either the functionality or the set of parameters governing the spatial confinement [12,[15][16][17][18]. In this Letter, we show unambiguously that the enhancement decays strictly according to a power-law functionality moderated by a single parameter that characterizes the tip sharpness.…”
mentioning
confidence: 51%
“…A fluorophore in the vicinity of a metal nanostructure which supports LSPRs can experience both enhancements of non-radiative and radiative decay rates [19][20][21][22][23][24][25]. The interaction is threefold involving excitation enhancement, emission enhancement and quenching of the fluorescence emission [20]. The LSPRs contribution to the modification of fluorescence excitation and emission process originates from enhanced local E-fields interacting with the fluorophore.…”
Section: Papermentioning
confidence: 99%
“…Essentially this occurs when the near field of the fluorophore and the nanostructure overlap, this caused an induction of surface charge oscillations in the metal whereby almost all energy is transferred from the fluorophore to the metal and lost through thermal dissipation [25]. This mechanism has shown to be the dominate decay channel at distances below 5 nm and it results in the emission intensity from the fluorophore to be greatly reduced [19][20][21][22][23][24][25].…”
Section: Papermentioning
confidence: 99%
See 1 more Smart Citation
“…Near-field optical imaging of single molecules has intrigued scientists since the demonstration by Betzig et al [19]. Unfortunately, it has been a challenge [7,16] to image fluorescent molecules with ANSOM due to the inherent molecular fluorescence fluctuation [inset of Fig. 1(b)] and the limited number of photons available before photochemical destruction (photobleaching) of the molecule.…”
mentioning
confidence: 99%