Terahertz imaging using quantum cascade lasers—a review of systems and applications
By P. Dean, A. Valavanis, J. Keeley, K. Bertling, Y. Lim, R. Alhathlool, A. Burnett, Lianhe H. Li, S. Khanna, D. Indjin and 4 more. 2014
163 citations recorded by the source corpus.
The terahertz (THz) frequency quantum cascade laser (QCL) is a compact source of THz radiation offering high power, high spectral purity and moderate tunability. As such, these sources are particularly suited to the application of THz frequency imaging across a range of disciplines, and have motivated significant research interest in this area over the past decade. In this paper we review the technological approaches to THz QCL-based imaging and the key advancements within this field. We discuss in detail a number of imaging approaches targeted to application areas including multiple-frequency transmission and diffuse reflection imaging for the spectral mapping of targets; as well as coherent approaches based on the self-mixing phenomenon in THz QCLs for long-range imaging, three-dimensional imaging, materials analysis, and high-resolution inverse synthetic aperture radar imaging.
Subfields: Electrical and Electronic Engineering, Spectroscopy
View Paper: https://www.semanticscholar.org/paper/0ce6dfa3f3e7d537d2c910f681b00c5c73f892bd
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In Electrical and Electronic Engineering
In Spectroscopy
Citations in the corpus
- Review of terahertz photoconductive antenna technology (2017, background): “On the other hand, reducing the energy of emitted photons generated by electron transitions in a semiconductor is inhibited by the fact that the energy of THz photons is less than the thermal energy at room temperature.(3) Other methods, that combine aspects of both photonics and electronics(4,5) ha”