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Broadband Infrared Vibrational Nano-spectroscopy Using Thermal Blackbody Radiation Público Deposited
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https://test-scholar.colorado.edu/concern/articles/z029p546h
- Abstract
- 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. The use of a thermal emitter as an IR source thus opens s-SNOM for routine chemical FTIR nano-spectroscopy.
- Creator
- Date Issued
- 2015-12-03
- Academic Affiliation
- Journal Title
- Journal Issue/Number
- 25
- Journal Volume
- 23
- File Extent
- 32063-32074
- Subject
- Última modificação
- 2019-12-09
- Resource Type
- Declaração de direitos
- DOI
- ISSN
- 1094-4087
- Language
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- Em Collection:
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Miniatura | Título | Data de carga | Acesso | Ações |
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broadbandInfraredVibrationalNanoSpectroscopyUsingThermalBl.pdf | 2019-12-09 | Público | Baixar |