Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 22: Posters: Quantum Optics and Photonics II
Q 22.28: Poster
Tuesday, March 10, 2020, 16:30–18:30, Empore Lichthof
Ultra-sensitive hyperspectral imaging with a high-speed scanning microcavity — •Evgenij Vasilenko1, Thomas Hümmer2, Theodor Wolfgang Hänsch2, Alexander Högele2, and David Hunger1 — 1Karlsruher Institut für Technologie, Karlsruhe — 2Ludwig-Maximilians-Universität, München
Tunable open-access Fabry-Perot microcavities [1] enable the combination of cavity enhanced spectroscopy with high resolution imaging [2,3]. Here we describe a custom-developed scanning microcavity that enables measurements of low absorption and scattering signals at the ppm level at high rates. We analyze the stability, speed, achievable sensitivity and background limitations of the system. As an example system, we investigate individual single-walled carbon nanotubes and demonstrate quantitative extinction spectroscopy of exciton resonances, revealing the heterogeneity of E11 transitions.
[1] D. Hunger et al., New J. Phys. 12, 065038 (2010)
[2] M. Mader et al., Nature Commun. 6, 7249 (2015)
[3] T. Hümmer et al., Nature Commun. 7, 12155 (2016)