%0 Journal Article %1 kramer2002cryogenic %A Kramer, Andrei %A Segura, Jean-Manuel %A Hunkeler, A. %A Renn, Alois %A Hecht, Bert %D 2002 %J Rev. Sci. Instrum. %K SNOM experiment nano-optics near-field spectroscopy %N 8 %P 2937-2941 %R 10.1063/1.1491028 %T A cryogenic scanning near-field optical microscope with shear-force gapwidth control %V 73 %X We present a scanning near-field optical microscope designed for nanoscale optical imaging and spectroscopy as well as simultaneous tuning fork shear-force topographic imaging at cryogenic temperatures. The whole setup is immersed in superfluid helium (T=1.8 K). In this medium we observe resonance frequency fluctuations of the tuning fork sensor with an amplitude of Δν≈5\%–10\% of the full width at half-maximum of the resonance. Possible reasons for the occurrence of the frequency fluctuations are discussed. A stable gapwidth feedback can still be achieved if the set value of the frequency shift is chosen slightly larger than the fluctuation amplitude. As an example we demonstrate shear-force topographic imaging of a silicon grating in superfluid helium.

@article{kramer2002cryogenic, abstract = {We present a scanning near-field optical microscope designed for nanoscale optical imaging and spectroscopy as well as simultaneous tuning fork shear-force topographic imaging at cryogenic temperatures. The whole setup is immersed in superfluid helium (T=1.8 K). In this medium we observe resonance frequency fluctuations of the tuning fork sensor with an amplitude of Δν≈5\%–10\% of the full width at half-maximum of the resonance. Possible reasons for the occurrence of the frequency fluctuations are discussed. A stable gapwidth feedback can still be achieved if the set value of the frequency shift is chosen slightly larger than the fluctuation amplitude. As an example we demonstrate shear-force topographic imaging of a silicon grating in superfluid helium.}, added-at = {2020-02-17T11:39:53.000+0100}, author = {Kramer, Andrei and Segura, Jean-Manuel and Hunkeler, A. and Renn, Alois and Hecht, Bert}, biburl = {https://www.bibsonomy.org/bibtex/27c9dc3c79a225630615ccc01903072a3/ep5optics}, day = 25, doi = {10.1063/1.1491028}, file = {Kramer et al. - 2002 - A cryogenic scanning near-field optical microscope.pdf:C\:\\Users\\scherzad\\Zotero\\storage\\7ECLWFAZ\\Kramer et al. - 2002 - A cryogenic scanning near-field optical microscope.pdf:application/pdf;Snapshot:C\:\\Users\\scherzad\\Zotero\\storage\\ZHEX9M9A\\1.html:text/html}, interhash = {ff6c9a23900a14d62035868bf9fda213}, intrahash = {7c9dc3c79a225630615ccc01903072a3}, issn = {0034-6748}, journal = {Rev. Sci. Instrum.}, keywords = {SNOM experiment nano-optics near-field spectroscopy}, month = {07}, number = 8, pages = {2937-2941}, timestamp = {2020-02-17T11:39:53.000+0100}, title = {A cryogenic scanning near-field optical microscope with shear-force gapwidth control}, urldate = {2020-02-17}, volume = 73, year = 2002 }