Ultra-sensitive fluorescence spectroscopy of isolated surface-adsorbed molecules using an optical nanofiber
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,...
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| Veröffentlicht in: | Optics express 2009-11, Vol.17 (24), p.21704-21711 |
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| container_title | Optics express |
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| creator | Stiebeiner, A Rehband, O Garcia-Fernandez, R Rauschenbeutel, A |
| description | 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. |
| doi_str_mv | 10.1364/OE.17.021704 |
| format | Article |
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| ispartof | Optics express, 2009-11, Vol.17 (24), p.21704-21711 |
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| source | MEDLINE; DOAJ Directory of Open Access Journals; EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection |
| subjects | Adsorption Anhydrides - chemistry Fiber Optic Technology Fluorescence Lasers Luminescence Optical Fibers Optics and Photonics Perylene - analogs & derivatives Perylene - chemistry Spectrometry, Fluorescence - instrumentation Spectrometry, Fluorescence - methods Surface Properties |
| title | Ultra-sensitive fluorescence spectroscopy of isolated surface-adsorbed molecules using an optical nanofiber |
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