Near-infrared nanospectroscopy using a low-noise supercontinuum source
| Autor: | Peter Uhd Jepsen, Lars Gruner-Nielsen, D S Shreesha Rao, Nicolas Stenger, Henrik B. Lassen, Edmund J. R. Kelleher, Korbinian J. Kaltenecker, Bert Hecht, Mattias Rasmussen, Enno Krauss, N. Asger Mortensen, Christos Markos, Ole Bang |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Computer Networks and Communications business.industry Near-infrared spectroscopy Physics::Optics 02 engineering and technology 021001 nanoscience & nanotechnology Laser 01 natural sciences Surface plasmon polariton Atomic and Molecular Physics and Optics law.invention Supercontinuum TA1501-1820 010309 optics Monocrystalline silicon Wavelength law 0103 physical sciences Dispersion (optics) Optoelectronics Applied optics. Photonics 0210 nano-technology Spectroscopy business |
| Zdroj: | APL Photonics, Vol 6, Iss 6, Pp 066106-066106-10 (2021) Kaltenecker, K J, Rao D. S., S, Rasmussen, M, Lassen, H B, Kelleher, E J R, Krauss, E, Hecht, B, Mortensen, N A, Grüner-Nielsen, L, Markos, C, Bang, O, Stenger, N & Jepsen, P U 2021, ' Near-infrared nanospectroscopy using a low-noise supercontinuum source ', APL Photonics, vol. 6, no. 6, 066106 . https://doi.org/10.1063/5.0050446 |
| ISSN: | 2378-0967 |
| DOI: | 10.1063/5.0050446 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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