TY - GEN
T1 - Characterization of Diamond Colors via Microwave Spectroscopy
AU - Rabinowitz, Yossi
AU - Etinger, Ariel
AU - Yahalom, Asher
AU - Cohen, Haim
AU - Pinhasi, Yosef
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/11
Y1 - 2019/11
N2 - The color grading of diamonds is affected mainly by the mode/concentration of nitrogen contamination in the diamond and to much lesser extent by structural defects in the crystal, although in very rare cases boron contamination also causes the appearance of a bluish grayish color. The characterization of rough diamonds for the jewelry industry is usually carried out by spectroscopic instrumentation (in the UV-visible or the Infra-red spectral range) or by XRD/surface techniques. However, the electromagnetic properties of diamonds in longer wave lengths can also shed light on their composition and structure and are much less sensitive to surface effects. The electromagnetic properties of several polished diamonds with different nitrogen concentrations have been determined. Some waveguides in the frequency range of 8-26 GHz and a polyethylene container to contain the diamonds to be studied have been designed and produced. The results have indicated that there is a good correlation between the nitrogen impurity content and the S12 parameter of a transition signal in the waveguide. Thus, it can be concluded that one can use measurements of the electromagnetic properties of diamonds in order to determine their color grading. In addition, a good correlation has been observed with the FTIR measurements of the diamonds.
AB - The color grading of diamonds is affected mainly by the mode/concentration of nitrogen contamination in the diamond and to much lesser extent by structural defects in the crystal, although in very rare cases boron contamination also causes the appearance of a bluish grayish color. The characterization of rough diamonds for the jewelry industry is usually carried out by spectroscopic instrumentation (in the UV-visible or the Infra-red spectral range) or by XRD/surface techniques. However, the electromagnetic properties of diamonds in longer wave lengths can also shed light on their composition and structure and are much less sensitive to surface effects. The electromagnetic properties of several polished diamonds with different nitrogen concentrations have been determined. Some waveguides in the frequency range of 8-26 GHz and a polyethylene container to contain the diamonds to be studied have been designed and produced. The results have indicated that there is a good correlation between the nitrogen impurity content and the S12 parameter of a transition signal in the waveguide. Thus, it can be concluded that one can use measurements of the electromagnetic properties of diamonds in order to determine their color grading. In addition, a good correlation has been observed with the FTIR measurements of the diamonds.
KW - measurement of dielectric and magnetic materials
KW - measurement techniques
KW - spectroscopy
KW - spectrum analysis
UR - http://www.scopus.com/inward/record.url?scp=85078887430&partnerID=8YFLogxK
U2 - 10.1109/COMCAS44984.2019.8958264
DO - 10.1109/COMCAS44984.2019.8958264
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AN - SCOPUS:85078887430
T3 - 2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems, COMCAS 2019
BT - 2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems, COMCAS 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2019 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems, COMCAS 2019
Y2 - 4 November 2019 through 6 November 2019
ER -