Abstract
We demonstrate that fluorescence of single molecules in the nanometric vicinity of a thin gold film can be effectively excited and detected through the film with an epi-illumination scanning confocal microscope. A full theoretical treatment of the fluorescence signal indicates that both excitation and emission are surface-plasmon mediatea. Remarkably, the number of photons detectable from chromophores perpendicular to the interface is enhanced by the presence of the metal.
| Original language | English |
|---|---|
| Article number | 023005 |
| Number of pages | 4 |
| Journal | Physical Review Letters |
| Volume | 94 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 21 Jan 2005 |
| Externally published | Yes |