Near-infrared nanospectroscopy using a low-noise supercontinuum source

Korbinian J. Kaltenecker; Shreesha Rao D. S.; Mattias Rasmussen; Henrik B. Lassen; Edmund J.R. Kelleher; Enno Krauss; Bert Hecht; N. Asger Mortensen; Lars Grüner-Nielsen; Christos Markos; Ole Bang; Nicolas Stenger; Peter Uhd Jepsen

doi:10.1063/5.0050446

Near-infrared nanospectroscopy using a low-noise supercontinuum source

Korbinian J. Kaltenecker, Shreesha Rao D. S., Mattias Rasmussen, Henrik B. Lassen, Edmund J.R. Kelleher, Enno Krauss, Bert Hecht, N. Asger Mortensen, Lars Grüner-Nielsen, Christos Markos, Ole Bang, Nicolas Stenger, Peter Uhd Jepsen^*

^*Corresponding author for this work

University of Würzburg

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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.

Original language	English
Article number	066106
Journal	APL Photonics
Volume	6
Issue number	6
Number of pages	11
ISSN	2378-0967
DOIs	https://doi.org/10.1063/5.0050446
Publication status	Published - 1 Jun 2021

Bibliographical note

Funding Information:
We acknowledge funding from European Union’s Horizon 2020 research and innovation program under Marie Sklodowska-Curie Grant Agreement No. 722380 (the project SUPUVIR), the Center for Nanostructured Graphene sponsored by the Danish National Research Foundation (Project No. DNRF103), and VIL-LUM FONDEN (Grant No. 16498). N.S. acknowledges support from VILLUM FONDEN (Grant No. 00028233) and from the Independent Research Fund Denmark—Natural Sciences (Project No. 0135-004038). The authors declare no conflicts of interest.

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© 2021 Author(s).

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title = "Near-infrared nanospectroscopy using a low-noise supercontinuum source",

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.",

author = "Kaltenecker, {Korbinian J.} and {Rao D. S.}, Shreesha and Mattias Rasmussen and Lassen, {Henrik B.} and Kelleher, {Edmund J.R.} and Enno Krauss and Bert Hecht and Mortensen, {N. Asger} and Lars Gr{\"u}ner-Nielsen and Christos Markos and Ole Bang and Nicolas Stenger and Jepsen, {Peter Uhd}",

note = "Funding Information: We acknowledge funding from European Union{\textquoteright}s Horizon 2020 research and innovation program under Marie Sklodowska-Curie Grant Agreement No. 722380 (the project SUPUVIR), the Center for Nanostructured Graphene sponsored by the Danish National Research Foundation (Project No. DNRF103), and VIL-LUM FONDEN (Grant No. 16498). N.S. acknowledges support from VILLUM FONDEN (Grant No. 00028233) and from the Independent Research Fund Denmark—Natural Sciences (Project No. 0135-004038). The authors declare no conflicts of interest. Publisher Copyright: {\textcopyright} 2021 Author(s).",

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AU - Kaltenecker, Korbinian J.

AU - Rao D. S., Shreesha

AU - Rasmussen, Mattias

AU - Lassen, Henrik B.

AU - Kelleher, Edmund J.R.

AU - Krauss, Enno

AU - Hecht, Bert

AU - Mortensen, N. Asger

AU - Grüner-Nielsen, Lars

AU - Markos, Christos

AU - Bang, Ole

AU - Stenger, Nicolas

AU - Jepsen, Peter Uhd

N1 - Funding Information: We acknowledge funding from European Union’s Horizon 2020 research and innovation program under Marie Sklodowska-Curie Grant Agreement No. 722380 (the project SUPUVIR), the Center for Nanostructured Graphene sponsored by the Danish National Research Foundation (Project No. DNRF103), and VIL-LUM FONDEN (Grant No. 16498). N.S. acknowledges support from VILLUM FONDEN (Grant No. 00028233) and from the Independent Research Fund Denmark—Natural Sciences (Project No. 0135-004038). The authors declare no conflicts of interest. Publisher Copyright: © 2021 Author(s).

PY - 2021/6/1

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N2 - 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.

AB - 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.

U2 - 10.1063/5.0050446

DO - 10.1063/5.0050446

M3 - Journal article

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JF - APL Photonics

IS - 6

M1 - 066106

ER -

Near-infrared nanospectroscopy using a low-noise supercontinuum source

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