Unlocking the true potential of optical spectroscopy on the nanoscale requires development of stable and low-noise laser sources. Here, we have developed a low-noise supercontinuum (SC) source based on an all-normal dispersion fiber pumped by a femtosecond fiber laser and demonstrate high resolution, spectrally resolved near-field measurements in the near-infrared (NIR) region. Specifically, we explore the reduced-noise requirements for aperture-less scattering-type scanning near-field optical microscopy (s-SNOM), including inherent pulse-to-pulse fluctuation of the SC. We use our SC light source to demonstrate the first NIR, spectrally resolved s-SNOM measurement, a situation where state-of-the-art commercial SC sources are too noisy to be useful. We map the propagation of surface plasmon polariton (SPP) waves on monocrystalline gold platelets in the wavelength region of 1.34–1.75 μm in a single measurement, thereby characterizing experimentally the dispersion curve of the SPP in the NIR. Our results represent a technological breakthrough that has the potential to enable a wide range of new applications of low-noise SC sources in near-field studies.
%0 Journal Article
%1 Kaltenecker_2021
%A Kaltenecker, Korbinian J.
%A S., Shreesha Rao D.
%A Rasmussen, Mattias
%A Lassen, Henrik B.
%A Kelleher, Edmund J. R.
%A Krauss, Enno
%A Hecht, Bert
%A Mortensen, N. Asger
%A Grüner-Nielsen, Lars
%A Markos, Christos
%A Bang, Ole
%A Stenger, Nicolas
%A Jepsen, Peter Uhd
%D 2021
%I AIP Publishing
%J APL Photonics
%K experiment infrared nano-optics nanospectroscopy near-field plasmon
%N 6
%P 066106
%R 10.1063/5.0050446
%T Near-infrared nanospectroscopy using a low-noise supercontinuum source
%U https://doi.org/10.1063%2F5.0050446
%V 6
%X Unlocking the true potential of optical spectroscopy on the nanoscale requires development of stable and low-noise laser sources. Here, we have developed a low-noise supercontinuum (SC) source based on an all-normal dispersion fiber pumped by a femtosecond fiber laser and demonstrate high resolution, spectrally resolved near-field measurements in the near-infrared (NIR) region. Specifically, we explore the reduced-noise requirements for aperture-less scattering-type scanning near-field optical microscopy (s-SNOM), including inherent pulse-to-pulse fluctuation of the SC. We use our SC light source to demonstrate the first NIR, spectrally resolved s-SNOM measurement, a situation where state-of-the-art commercial SC sources are too noisy to be useful. We map the propagation of surface plasmon polariton (SPP) waves on monocrystalline gold platelets in the wavelength region of 1.34–1.75 μm in a single measurement, thereby characterizing experimentally the dispersion curve of the SPP in the NIR. Our results represent a technological breakthrough that has the potential to enable a wide range of new applications of low-noise SC sources in near-field studies.
@article{Kaltenecker_2021,
abstract = {Unlocking the true potential of optical spectroscopy on the nanoscale requires development of stable and low-noise laser sources. Here, we have developed a low-noise supercontinuum (SC) source based on an all-normal dispersion fiber pumped by a femtosecond fiber laser and demonstrate high resolution, spectrally resolved near-field measurements in the near-infrared (NIR) region. Specifically, we explore the reduced-noise requirements for aperture-less scattering-type scanning near-field optical microscopy (s-SNOM), including inherent pulse-to-pulse fluctuation of the SC. We use our SC light source to demonstrate the first NIR, spectrally resolved s-SNOM measurement, a situation where state-of-the-art commercial SC sources are too noisy to be useful. We map the propagation of surface plasmon polariton (SPP) waves on monocrystalline gold platelets in the wavelength region of 1.34–1.75 μm in a single measurement, thereby characterizing experimentally the dispersion curve of the SPP in the NIR. Our results represent a technological breakthrough that has the potential to enable a wide range of new applications of low-noise SC sources in near-field studies.},
added-at = {2021-06-16T13:17:37.000+0200},
author = {Kaltenecker, Korbinian J. and S., Shreesha Rao D. and Rasmussen, Mattias and Lassen, Henrik B. and Kelleher, Edmund J. R. and Krauss, Enno and Hecht, Bert and Mortensen, N. Asger and Grüner-Nielsen, Lars and Markos, Christos and Bang, Ole and Stenger, Nicolas and Jepsen, Peter Uhd},
biburl = {https://www.bibsonomy.org/bibtex/20cdfdf2b8118894b58fa9ecee213309c/ep5optics},
doi = {10.1063/5.0050446},
interhash = {f80db282ba1c6d9672a3c34f155031e1},
intrahash = {0cdfdf2b8118894b58fa9ecee213309c},
journal = {{APL} Photonics},
keywords = {experiment infrared nano-optics nanospectroscopy near-field plasmon},
month = jun,
number = 6,
pages = 066106,
publisher = {{AIP} Publishing},
timestamp = {2021-08-02T13:11:27.000+0200},
title = {Near-infrared nanospectroscopy using a low-noise supercontinuum source},
url = {https://doi.org/10.1063%2F5.0050446},
volume = 6,
year = 2021
}