Hannover 2013 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 16: Photonics II

Q 16.4: Talk

Monday, March 18, 2013, 17:15–17:30, A 310

Chemical surface protection of optical microfibres examined with Raman spectroscopy — •Jan Hartung, Marcel Spurny, Wolfgang Alt, and Dieter Meschede — Institut für Angewandte Physik, Universität Bonn

The strong evanescent field of tapered optical microfibres makes them an excellent tool for light-matter interaction experiments. However, their high sensitivities to surface adsorbed molecules impose a problem: Microfibre transmission can be strongly influenced by surface adsorbates and chemical reaction of dangling bonds with the surrounding medium, especially in a chemically aggressive environment such as hot caesium vapour.

We present a method for surface passivation of tapered optical microfibres by silylation with methyl chlorosilanes and the examination of our microfibre samples with Raman spectroscopy before and after the treatment. This chemical surface passivation extends the range of environments in which optical microfibres can be used.