Polarization-dependent optical properties of orthorhombic sulfur in the ultraviolet

Orthorhombic Sulfur (α-S)

“…They measured the reflectance for polarization parallel to the a-and b-axes for up to 12 eV, from which the optical constants were obtained with Kramers-Kronig analysis. The variation of optical properties with polarization is illustrated by a peak reflectance at 9.5 eV, which dominated the spectra of Cook and Spear [27], but was not nearly as strong and occurred at a somewhat lower energy in the work reported by Emerald et al The orientation of the polycrystalline samples in the measurements made by Sasson et al [24] are compatible with the UV work of Emerald et al [28], and their values for n have been selected for tabulation in the visible to near-IR. To maintain consistency with data at lower energies, values presented here for n and k in the UV are simple averages of those obtained for the two polarizations.…”

“…The data of Emerald et al [28] was chosen for the UV. They measured the reflectance for polarization parallel to the a-and b-axes for up to 12 eV, from which the optical constants were obtained with Kramers-Kronig analysis.…”

“…A considerable amount of work has been published on the transmission spectra of this allo-trope in the infrared [14][15][16][17][18][19][20][21][22][23]. Kurrelmeyer [25] and Spear and Adams [26] measured the absorption coefficient in the visible region, while investigating the photoconductivity of a-S. Its reflectance spectrum was studied with unpolarized UV light by Cook and Spear [27] and polarimetrically by Emerald et al [28]. Kurrelmeyer [25] and Spear and Adams [26] measured the absorption coefficient in the visible region, while investigating the photoconductivity of a-S. Its reflectance spectrum was studied with unpolarized UV light by Cook and Spear [27] and polarimetrically by Emerald et al [28].…”

On the colors of Jupiter's satellite Io: Irradiation of solid sulfur at 77 K

“…, 1966] and partly understood [Cook and Spear, 1969;Salanek et al, 1975;Richardson and Weinberger, 1975;Emerald et al, 1976]. The lowest energy electronic transition has been calculated as 324 nm (3.83 eV) [Richardson and Weinberger, 1975] or as 3.6 eV (344 nm) [Emerald et al, 1976;Salanek et al, 1975-]. As this energy is much higher than the Ss bond dissociation energy of 1.5 eV [-Steudel, 1983], the formation of a radical chain molecule seems plausible.…”

“…The highly diluted radicals in the deeper regions of the crystals will simply recombine to cyclo-Ss on warming (possibly via S,S). , 1966] and partly understood [Cook and Spear, 1969;Salanek et al, 1975;Richardson and Weinberger, 1975;Emerald et al, 1976]. The lowest energy electronic transition has been calculated as 324 nm (3.83 eV) [Richardson and Weinberger, 1975] or as 3.6 eV (344 nm) [Emerald et al, 1976;Salanek et al, 1975-].…”