20 February 2017 Understanding the source of dielectric loss in Titania/polypropylene nanocomposites up to 220 GHz
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Proceedings Volume 10109, Optical Interconnects XVII; 1010908 (2017) https://doi.org/10.1117/12.2250346
Event: SPIE OPTO, 2017, San Francisco, California, United States
Nanocomposites are a promising new dielectric material for on-chip and chip-to-chip waveguides that operate at millimeter (mm)-wave frequencies because of their higher relative permittivity compared to neat polymers and their compatibility with printed circuit board processing. For dielectric waveguides, extremely low loss is critical; thus, understanding the origins of loss is an important step for these applications. In this paper, we investigate the sources of loss in TiO2/polypropylene (PP) nanocomposites, in which polypropylene-graft-maleic anhydride (PP-g-MA) is added as a compatibilizer. Compared to nanocomposites made without PP-g-MA, we find that PP-g-MA improves the distribution of nanoparticles in the PP matrix and significantly lowers loss. We also examine the contribution to dielectric loss from PP-g-MA by measuring samples that contain no TiO2 nanoparticles, and find that while increasing the amount of PP-g- MA in PP results in a higher loss, it is small compared to the loss that comes from the addition of TiO2 nanoparticles.
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Michael D. Womble, Michael D. Womble, Juan Herbsommer, Juan Herbsommer, Yun-Ju Lee, Yun-Ju Lee, Julia Hsu, Julia Hsu, } "Understanding the source of dielectric loss in Titania/polypropylene nanocomposites up to 220 GHz", Proc. SPIE 10109, Optical Interconnects XVII, 1010908 (20 February 2017); doi: 10.1117/12.2250346; https://doi.org/10.1117/12.2250346

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