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Terahertz hyperspectral imaging with dual chip-scale combs

Author(s): Sterczewski, Lukasz A; Westberg, Jonas; Yang, Yang; Burghoff, David; Reno, John; et al

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dc.contributor.authorSterczewski, Lukasz A-
dc.contributor.authorWestberg, Jonas-
dc.contributor.authorYang, Yang-
dc.contributor.authorBurghoff, David-
dc.contributor.authorReno, John-
dc.contributor.authorHu, Qing-
dc.contributor.authorWysocki, Gerard-
dc.identifier.citationSterczewski, Lukasz A, Westberg, Jonas, Yang, Yang, Burghoff, David, Reno, John, Hu, Qing, Wysocki, Gerard. (2019). Terahertz hyperspectral imaging with dual chip-scale combs. OPTICA, 6 (6), 766 - 771. doi:10.1364/OPTICA.6.000766en_US
dc.description.abstractHyperspectral imaging is a spectroscopic imaging technique that allows for the creation of images with pixels containing information from multiple spectral bands. At terahertz wavelengths, it has emerged as a prominent tool for a number of applications, ranging from nonionizing cancer diagnosis and pharmaceutical characterization to nondestructive artifact testing. Contemporary terahertz imaging systems typically rely on nonlinear optical downconversion of a fiber-based near-infrared femtosecond laser, requiring complex optical systems. Here, we demonstrate hyperspectral imaging with chip-scale frequency combs based on terahertz quantum cascade lasers. The dual combs are freerunning and emit coherent terahertz radiation that covers a bandwidth of 220 GHz at 3.4 THz with ~10 µW per line. The combination of the fast acquisition rate of dual-comb spectroscopy with the monolithic design, scalability, and chip-scale size of the combs is highly appealing for future imaging applications in biomedicine and the pharmaceutical industry.en_US
dc.format.extent766 - 771en_US
dc.rightsAuthor's manuscripten_US
dc.titleTerahertz hyperspectral imaging with dual chip-scale combsen_US
dc.typeJournal Articleen_US

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