Spectroscopic phase modulated ellipsometry in application to some novel single and polycrystalline ternary compounds

Abstract

The results of the application of the spectroscopic phase modulated ellipsometry (SPME) to a series of novel ternary compounds from anisotropic to polycrystalline are presented to show the high effectiveness of this optical technique with regard to the dielectric function of the new materials. Besides, SPME in specular reflection mode to study the polarization degree of the light reflected at specular angle is shown to be very informative in determination of the best conditions for optical measurements on rough surfaces such as, for example, surfaces of the polycrystalline ternary thiogallate compounds studied in this work. An incoherent approach relating the measured depolarization with the surface variance and optical constants of a material or thin film is proposed.

Band gap exciton in ferroelectric TlInS2: Dimensionality and screening

“…We have managed to reliably track down the temperature evolution of the dielectric function of TlInS 2 in E ║ c * polarization with the aid of spectroscopic phase modulated ellipsometry we used to apply to TlMeX 2 .…”

Оптические свойства полиэтилена, наполненного нанокристаллитами Bi-=SUB=-2-=/SUB=-Te-=SUB=-3-=/SUB=-

“…Это связано с кластеризацией в образцах и недостающая часть нанокристаллитов скапливается в кластерах, что будет показано далее. В работе [6] описана методика исследования корреляции между деполяризацией D и зернистостью и определения среднего размера зерен. Применительно к нашему случаю, эти исследования помогли оценить средние размеры микрокластеров, образованных группами наночастиц.…”

Temperature-dependent and pump-probe ellipsometric studies of TlInSe2

“…While room temperature dielectric function and optical constants of TlInSe 2 have been studied in detail by SE in a number of works (see, for example, [13]), temperature-dependent SE has not been performed ever before on this material.…”