@article{180781,
  keywords = {Optical Imaging, Absorption spectroscopy, Electromagnetic radiation, Hyperspectral imaging, Imaging systems, Imaging techniques},
  author = {Lukasz A. Sterczewski and Jonas Westberg and Yang Yang and David Burghoff and John Reno and Qing Hu and Gerard Wysocki},
  title = {Terahertz hyperspectral imaging with dual chip-scale combs},
  abstract = { Hyperspectral 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 free-running 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. },
  year = {2019},
  journal = {Optica},
  volume = {6},
  number = {6},
  pages = {766-771},
  month = {06/2019},
  publisher = {OSA},
  url = {http://www.osapublishing.org/optica/abstract.cfm?URI=optica-6-6-766},
  language = {eng},
}