Optical properties of amorphous carbon determined by reflection electron energy loss spectroscopy spectra
Lihao Yang, J. M. Gong, Attila Sulyok, M. Menyhárd, György Sáfrán, K. Tőkési, Bo Da, Zejun Ding
Abstract
were determined from these REELS spectra in a wide loss energy range of 2-200 eV by applying our reverse Monte Carlo method. The high accuracy of the obtained optical constants is justified with the ps- and f-sum rules. We found that our present optical constants of amorphous carbon fulfill the sum rules with the highest accuracy compared with the previously published data. Therefore, we highly recommend to replace the previous data with the present ones for practical applications. Moreover, we present the atomic scattering factors of amorphous carbon obtained from the dielectric function to predict its optical constants at a given density.
Topics & Concepts
Electron energy loss spectroscopyMolar absorptivityAmorphous carbonAmorphous solidCarbon fibersReverse Monte CarloSpectral lineSpectroscopyMonte Carlo methodMaterials scienceRefractive indexReflection (computer programming)Atomic physicsMolecular physicsAnalytical Chemistry (journal)OpticsChemistryPhysicsOptoelectronicsNanotechnologyComposite numberCrystallographyComputer scienceProgramming languageChromatographyTransmission electron microscopyAstronomyQuantum mechanicsNeutron diffractionDiffractionStatisticsComposite materialMathematicsDiamond and Carbon-based Materials ResearchSemiconductor materials and devicesElectron and X-Ray Spectroscopy Techniques