Interband optical transitions of Zn

Abstract

Experimental results of an optical study of single-crystal zinc are presented. Components of the Zn dielectric function tensor were measured by spectroscopic ellipsometry in the 0.1-5 eV spectral range. In the NIR-VIS range, the dielectric function spectra show two clearly resolved, polarization-dependent optical features located at about 1 and 1.7 eV. The optical features were analyzed in a framework of parallel-band optical transitions. The performed theoretical calculations of the optical conductivity spectra well reproduce the experimental data with respect to positions, intensities, and polarization dependencies of the observed interband absorption peaks.

Unfolding optical transition weights of impurity materials for first-principles LCAO electronic structure calculations

“…The optical properties contain fundamental features of materials, including optical conductivity, dielectric function, refractive index, reflectivity, and transmission that can be measured by experiments [1][2][3][4][5][6][7][8][9], and have been widely studied for a variety of compounds, such as solids [10][11][12][13], nanoparticles [14,15], 2D materials [16][17][18][19][20], superconductors [21][22][23][24], and biological tissues [25]. The optical conductivity and dielectric function of materials are two important measurable quantities for understanding natural phenomena, such as current density caused by an alternative electric field, optical transitions, and energy dissipation [26][27][28][29][30]. To adjust light absorption capability of materials or to shift absorption energy range for designing new optical devices, fabricating different composites of materials by dopants or substitutions are possible and promising for practical applications [31][32][33][34][35].…”