Conflict of Interest The authors declare no conflict of interest. Supporting Information Filename Description adma202305106-sup-0001-SuppMat.pdf642 KB Supporting Information References 1, , , , J. Appl. Phys. 2019, 125, 191102. 2, , , Science 2016, 354, aag1992. 3, , , , , , , , , , Nat. Mater. 2016, 16, 182. 4, , , , , , , Nanophotonics 2015, 4, 44. 5, , , , , Nanophotonics 2019, 8, 2129. 6, The Reststrahlen Region. Optical Properties of Crystalline and Amorphous Semiconductors, Springer, Boston, MA 1999.