Ultra-sensitive fluorescence spectroscopy of isolated surface-adsorbed molecules using an optical nanofiber
| Autor: | Arno Rauschenbeutel, Ariane Stiebeiner, R. Garcia-Fernandez, O. Rehband |
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| Rok vydání: | 2009 |
| Předmět: |
Optics and Photonics
Materials science Optical fiber Luminescence Surface Properties Fluorescence spectroscopy Fluorescence law.invention Anhydrides Optics law Monolayer Fiber Optic Technology Spectroscopy Laser-induced fluorescence Perylene Optical Fibers Total internal reflection business.industry Lasers Atomic and Molecular Physics and Optics Spectrometry Fluorescence Adsorption business |
| Zdroj: | ResearcherID |
| ISSN: | 1094-4087 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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