Hyperspectral Infrared Microscopy With Visible Light

• URL: http://arxiv.org/abs/2002.05956v1
• Date: Fri, 14 Feb 2020 10:29:32 GMT
• Title: Hyperspectral Infrared Microscopy With Visible Light
• Authors: Anna V. Paterova, Sivakumar M. Maniam, Hongzhi Yang, Gianluca Grenci, and Leonid A. Krivitsky
• Abstract summary: We introduce a new approach to IR hyperspectral microscopy, where the IR spectral map of the sample is obtained with off-the-shelf components built for visible light. The technique provides a wide field of view, fast readout, and negligible heat delivered to the sample, which makes it highly relevant to material and biological applications.
• Score: 0.4893345190925178
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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. We introduce a new approach to IR hyperspectral microscopy, where the IR spectral map of the sample is obtained with off-the-shelf components built for visible light. The technique is based on the nonlinear interference of correlated photons generated via parametric down-conversion. We demonstrate chemical mapping of a patterned sample, in which different areas have distinctive IR spectroscopic fingerprints. The technique provides a wide field of view, fast readout, and negligible heat delivered to the sample, which makes it highly relevant to material and biological applications.

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