Dispersion models are necessary for precise determination of the dielectric response of materials... more Dispersion models are necessary for precise determination of the dielectric response of materials used in optical and microelectronics industry. Although the study of the dielectric response is often limited only to the dependence of the optical constants on frequency, it is also important to consider its dependence on other quantities characterizing the state of the system. One of the most important quantities determining the state of the condensed matter in equilibrium is temperature. Introducing temperature dependence into dispersion models is quite challenging. A physically correct model of dielectric response must respect three fundamental and one supplementary conditions imposed on the dielectric function. The three fundamental conditions are the time-reversal symmetry, Kramers-Kronig consistency and sum rule. These three fundamental conditions are valid for any material in any state. For systems in equilibrium there is also a supplementary dissipative condition. In this contr...
OPTOELECTRONICS AND ADVANCED MATERIALS-RAPID COMMUNICATIONS
In this paper a combined spectrophotometric method is used to analyzed As-S chalcogenide thin fil... more In this paper a combined spectrophotometric method is used to analyzed As-S chalcogenide thin films. This method is based on the simultaneous interpretation of experimental data corresponding to the reflectance from the ambient side, reflectance from the substrate side and transmittance of the chalcogenide films deposited onto the glass substrate. It is shown that this method is usable for the optical characterization of the chalcogenide films even when these films exhibit an inhomogeneity formed by a refractive index profile. Within this method our dispersion model of the optical constants of amorphous materials is used. This means that the values of the dispersion parameters determining the spectral dependences of the optical constants of the As-S chalcogenide material are evaluated. In the paper the advantages of the combined method mentioned are discussed from the practical point of view. us to perform the complete optical analysis of the chalcogenide thin films in an efficient ...
Dispersion models are necessary for precise determination of the dielectric response of materials... more Dispersion models are necessary for precise determination of the dielectric response of materials used in optical and microelectronics industry. Although the study of the dielectric response is often limited only to the dependence of the optical constants on frequency, it is also important to consider its dependence on other quantities characterizing the state of the system. One of the most important quantities determining the state of the condensed matter in equilibrium is temperature. Introducing temperature dependence into dispersion models is quite challenging. A physically correct model of dielectric response must respect three fundamental and one supplementary conditions imposed on the dielectric function. The three fundamental conditions are the time-reversal symmetry, Kramers-Kronig consistency and sum rule. These three fundamental conditions are valid for any material in any state. For systems in equilibrium there is also a supplementary dissipative condition. In this contr...
OPTOELECTRONICS AND ADVANCED MATERIALS-RAPID COMMUNICATIONS
In this paper a combined spectrophotometric method is used to analyzed As-S chalcogenide thin fil... more In this paper a combined spectrophotometric method is used to analyzed As-S chalcogenide thin films. This method is based on the simultaneous interpretation of experimental data corresponding to the reflectance from the ambient side, reflectance from the substrate side and transmittance of the chalcogenide films deposited onto the glass substrate. It is shown that this method is usable for the optical characterization of the chalcogenide films even when these films exhibit an inhomogeneity formed by a refractive index profile. Within this method our dispersion model of the optical constants of amorphous materials is used. This means that the values of the dispersion parameters determining the spectral dependences of the optical constants of the As-S chalcogenide material are evaluated. In the paper the advantages of the combined method mentioned are discussed from the practical point of view. us to perform the complete optical analysis of the chalcogenide thin films in an efficient ...
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