@article{2007-warken-rauschenbeutel-opt-exp-v15-p11952,
	Abstract = {The guided modes of sub-wavelength diameter air-clad optical fibers exhibit a pronounced evanescent field. The absorption of particles on the fiber surface is therefore readily detected via the fiber transmission. We show that the resulting absorption for a given surface coverage can be orders of magnitude higher than for conventional surface spectroscopy. As a demonstration, we present measurements on sub-monolayers of 3,4,9,10-perylene-tetracarboxylic dianhydride (PTCDA) molecules at ambient conditions, revealing the agglomeration dynamics on a second to minutes timescale.},
	Author = {Warken, F. AND Vetsch, E. AND Meschede, D. AND Sokolowski, M. AND Rauschenbeutel, A.},
	Journal = {Opt. Express},
	Pages = {11952},
	Title = {{Ultra-sensitive surface absorption spectroscopy using sub-wavelength diameter optical fibers}},
	Volume = {15},
	Year = {2007}
}