Broadband infrared vibrational nano-spectroscopy using thermal blackbody radiation
- Univ. of Colorado, Boulder, CO (United States)
Infrared vibrational nano-spectroscopy based on scattering scanning near-field optical microscopy (s-SNOM) provides intrinsic chemical specificity with nanometer spatial resolution. Here we use incoherent infrared radiation from a 1400 K thermal blackbody emitter for broadband infrared (IR) nano-spectroscopy.With optimized interferometric heterodyne signal amplification we achieve few-monolayer sensitivity in phonon polariton spectroscopy and attomolar molecular vibrational spectroscopy. Near-field localization and nanoscale spatial resolution is demonstrated in imaging flakes of hexagonal boron nitride (hBN) and determination of its phonon polariton dispersion relation. The signal-to-noise ratio calculations and analysis for different samples and illumination sources provide a reference for irradiance requirements and the attainable near-field signal levels in s-SNOM in general. As a result, the use of a thermal emitter as an IR source thus opens s-SNOM for routine chemical FTIR nano-spectroscopy.
- Research Organization:
- Univ. of Colorado, Boulder, CO (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0008807
- OSTI ID:
- 1240131
- Journal Information:
- Optics Express, Vol. 23, Issue 25; ISSN 1094-4087
- Publisher:
- Optical Society of America (OSA)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Review: Tip-based vibrational spectroscopy for nanoscale analysis of emerging energy materials
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journal | January 2018 |
Hyperspectral infrared nanoimaging of organic samples based on Fourier transform infrared nanospectroscopy
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journal | February 2017 |
Near-field magneto-caloritronic nanoscopy on ferromagnetic nanostructures
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journal | December 2018 |
Comparison of active and passive methods for the infrared scanning near-field microscopy
|
journal | April 2019 |
Near-field magneto-caloritronic nanoscopy on ferromagnetic nanostructures
|
text | January 2019 |
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