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Hannover 2020 – wissenschaftliches Programm

Die DPG-Frühjahrstagung in Hannover musste abgesagt werden! Lesen Sie mehr ...

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Q: Fachverband Quantenoptik und Photonik

Q 22: Posters: Quantum Optics and Photonics II

Q 22.28: Poster

Dienstag, 10. März 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 Hunger11Karlsruher 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)

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