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LT-APO objective ranges chromatic focal shift & wavelength ranges of typical emitters LT -APO/TR/0.81 3 µm LT -APO/VIO/0.81 LT -APO/VIS/0.82 LT -APO/UV-A/0.81 LT -APO/NIR/0.81 LT -APO/VISIR/0.82 2 µm 1 µm ‚apochromatic‘ working range: • chromatic focal shift smaller +/- depth of focus • uniform spot size • intensity of emitters within 75-100% focal plane +/- depth of field 0 µm 300 nm 2-dim. structures 400 nm nm 500 nm nm 400 500 Wavelength (nm) 600 nm nm 600 700 nm 800 nm 900 nm 1000 nm 1100 nm 1200 nm 1300 nm 1400 nm MoS 2 @ 3 K 2D van der Waals heterostructures 1 MoS 2 / WS 2 MoSe 2 / WSe 2 2 semiconducting quantum wells (II-VI & III-V, e.g. GaAs, CdSe, InGaAs,..) 1-dim. structures ensemble of functionalized nanotubes 3 CNT @ 25 K carbon nanotubes covalently functionalized nanotubes 4 semiconducting nanowires (II-VI & III-V) 5 Image sources: http://en.wikipedia.org/wiki/Chalcogenide http://en.wikipedia.org/wiki/Quantum_dot http://en.wikipedia.org/wiki/Kohlenstoffnanor%C3%B6hre 4 http://en.wikipedia.org/wiki/Vapor–liquid–solid_method 5 http://xqp.physik.uni-muenchen.de/research/single_photon/index.html 6 http://de.wikipedia.org/wiki/Quantenpunkt 1 NV center @ 300 K 2 3 6 NV centers, single molecules 0-dim. structures semiconductor & colloidal quantum dots (II-VI & III-V, e.g. GaAs, InGaAs,...) dyes (e.g. Cy3, Cy5, Atto600-700,...) 300 nm 400 nm nm 400 500 nm nm 500 600 nm nm 600 700 nm 800 nm 900 nm 1000 nm 1100 nm 1200 nm 1300 nm 1400 nm attoMICROSCOPY Sophisticated Tools for Science

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