期刊
IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY
卷 10, 期 4, 页码 348-357出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TTHZ.2020.2985642
关键词
Proteins; Spectroscopy; Absorption; Biomedical optical imaging; Optical polarization; Optical sensors; Circular dichroism (CD); myoglobin (MB); quasi-optical; terahertz (THZ)
资金
- Engineering and Physical Sciences Research Council [EP/N50953X/1]
A quasi-optically based, sub-terahertz, circular dichroism (CD) spectrometer is demonstrated on the model protein, myoglobin, over waveguide bands D (110-170 GHz) and H (220-325 GHz). In doing so, an equivalent methodology is propounded for acquiring cross-polar spectra that eliminates the need for having to physically rotate the receive-horn through 90 degrees. A significant source of systematic-error is, thereby, eliminated (and, no less, random-error that follows when cabling is moved). The zero-crossing points of CD spectra are characterized as they are correlated with traditional far-ultraviolet CD spectra for given environmental parameter settings of, for example, pH and/or sample concentration.
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