Extends the wavelength coverage of the Vertex 80v FT-IR spectrometer into the THz range. The existing infrared ranges and continuous-wave THz can be used in the same sample compartment, share the same accessories and the evacuated optics bench. With the extension, wavelength range is from <3 cm–1 to 50,000 cm–1 without cryogenically cooled components.
Keith Nelson has received the 2017 Bomem–Michelson Award.
Terahertz spectroscopy and imaging of Paleolithic cave etchings, 14th century paintings in a church and a mid-20th century Italian painting are all described. This helps demonstrate the versatility of the technique as well as its potential in cultural heritage preservation.
Researchers have nearly doubled the continuous output power of a terahertz quantum cascade laser. Increasing the continuous output power of these lasers is an important step toward increasing the range of practical applications.
Terahertz radiation is of growing interest due to its potential for new spectroscopy and imaging applications as well as wireless communication networks with extremely high bandwidth. However, there are few off-the-shelf components available for manipulating terahertz waves.
Terahertz imaging technology has the potential to help conservationists and academics better understand the history behind cultural artefacts.
A newly devised frequency comb provides a powerful light source, spanning frequencies of over 550 GHz with a total power of 5 mW. At the heart of the frequency combs are terahertz (THz) quantum cascade lasers (QCLs), which have the advantage of having both high power (in the form of THz radiation) and broadband capabilities (since the QCLs have gain over a wider frequency range). Combining...
The use of the terahertz region is in the headlines at present with its ability to screen passengers at airports, but it has important uses in the analytical field as well. This article reviews the latest research on proteins and peptides using THz-TDS, p-germanium lasers (75–85 cm–1) and far-infrared Fourier transform spectroscopy below 350 cm–1.
Philip F. Taday and David A. Newnham
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