16 February 2017 Mid- and far-infrared optical characterization of monoclinic HfO2 nanoparticles and evidence of localized surface phonon polaritons
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Proceedings Volume 10100, Optical Components and Materials XIV; 101001G (2017) https://doi.org/10.1117/12.2252844
Event: SPIE OPTO, 2017, San Francisco, California, United States
Abstract
Monoclinic HfO2 nanoparticles (9 - 45 nm) are synthesized using a sol-gel method and optically characterized using transmission- and angle-dependent reflection spectroscopy in the mid- to far-infrared. A detailed HfO2 identification of the infrared-active phonon modes is presented; consistent with previously reported thin film values, and in excellent agreement with density functional perturbation theory calculations. An anomaly is observed in both reflection and transmission measurements, at 556 cm-1 that is not attributed to the optical phonon modes. Numerical models indicate that this measured anomaly is in the spectral region of a localized surface phonon polariton mode. The results of this work suggest that HfO2 nanoparticles could enable new mid- and far-infrared materials and devices with engineered optical properties.
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Owen Dominguez, Tracie L. McGinnity, Ryan K. Roeder, Anthony J. Hoffman, "Mid- and far-infrared optical characterization of monoclinic HfO2 nanoparticles and evidence of localized surface phonon polaritons", Proc. SPIE 10100, Optical Components and Materials XIV, 101001G (16 February 2017); doi: 10.1117/12.2252844; https://doi.org/10.1117/12.2252844
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