6533b825fe1ef96bd12829fd
RESEARCH PRODUCT
Ultra-sensitive fluorescence spectroscopy of isolated surface-adsorbed molecules using an optical nanofiber.
Arno RauschenbeutelAriane StiebeinerR. Garcia-fernandezO. Rehbandsubject
Optics and PhotonicsMaterials scienceOptical fiberLuminescenceSurface PropertiesFluorescence spectroscopyFluorescencelaw.inventionAnhydridesOpticslawMonolayerFiber Optic TechnologySpectroscopyLaser-induced fluorescencePeryleneOptical FibersTotal internal reflectionbusiness.industryLasersFluorescenceAtomic and Molecular Physics and OpticsSpectrometry FluorescenceAdsorptionLuminescencebusinessdescription
The strong radial confinement and the pronounced evanescent field of the guided light in optical nanofibers yield favorable conditions for ultra-sensitive surface spectroscopy of molecules deposited on the fiber. Using the guided mode of the nanofiber for both excitation and fluorescence collection, we present spectroscopic measurements on 3,4,9,10-perylenetetracarboxylic dianhydride molecules (PTCDA) at ambient conditions. Surface coverages as small as 1 per thousand of a compact monolayer still give rise to fluorescence spectra with a good signal to noise ratio. Moreover, we analyze and quantify the self-absorption effects due to reabsorption of the emitted fluorescence light by circumjacent surface-adsorbed molecules distributed along the fiber waist.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-12-10 | Optics express |