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Check out Ryan Kowalski and Ryan Nolen’s paper on the infrared dielectric function of Hf-based TMDs!

Posted by on Wednesday, September 7, 2022 in News.

Our recent work on the infrared dielectric function of Hf-based transition metal dichalcogenides (TMDs) was just published in Advanced Optical Materials! In this work, we extract the mid- to far-infrared dielectric function of HfS2 and HfSe2, which have exceptionally large Reststrahlen bands that extend throughout the far-infrared. In collaboration with the Stephanie Law’s group (U of Delaware) and Prineha Narang’s group (Harvard), we investigate the large Born effective charge as the mechanism for such spectrally wide Reststrahlen bands. These materials are also naturally anisotropic and support hyperbolic phonon polaritons, which may be incorporated into the limited optical infrastructure of the far-infrared.

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