Hyperspectral infrared microscopy with visible light

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Hyperspectral infrared microscopy with visible light
Title:
Hyperspectral infrared microscopy with visible light
Other Titles:
Science Advances
Publication Date:
30 October 2020
Citation:
Paterova, A. V., Maniam, S. M., Yang, H., Grenci, G., & Krivitsky, L. A. (2020). Hyperspectral infrared microscopy with visible light. Science Advances, 6(44). doi:10.1126/sciadv.abd0460
Abstract:
Hyperspectral microscopy is an imaging technique that provides spectroscopic information with high spatial resolution. When applied in the relevant wavelength region, such as in the infrared (IR), it can reveal a rich spectral fingerprint across different regions of a sample. Challenges associated with low efficiency and high cost of IR light sources and detector arrays have limited its broad adoption. Here, we introduce a new approach to IR hyperspectral microscopy, where the IR spectral map is obtained with off-the-shelf components built for visible light. The method is based on the nonlinear interference of correlated photons generated via parametric down-conversion. In this proof-of-concept we demonstrate the chemical mapping of a patterned sample, where different areas have distinctive IR spectroscopic fingerprints. The method provides a wide field of view, fast readout, and negligible heat delivered to the sample, which opens prospects for its further development for applications in material and biological studies.
License type:
Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
Funding Info:
Quantum Technology for Engineering (QTE) program of A*STAR (Award no. A1685b0005)
Description:
ISSN:
2375-2548
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