Terahertz hyperspectral imaging with dual chip-scale combs
Name
optica-6-6-766.pdf
Description
Published version
Size
1.66 MB
Format
Adobe PDF
Checksum (MD5)
330028fd3feefd3acbe560fd7aec024a
Author(s)
Yang, Yang
Burghoff, David Patrick
Hu, Qing
Date Issued
May 2019
Journal
Optica
Publisher
Optical Society of America (OSA)
Citation
Sterczewski, Lukasz A. et al. “Terahertz hyperspectral imaging with dual chip-scale combs.” Optica 6, 6 (May 2019): 766-771 © 2019 The Author(s)
Version
Final published version
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 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.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Research Laboratory of Electronics
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1364/OPTICA.6.000766
