Physics Group
Permanent URI for this collection
Browse
Browsing Physics Group by Author "Coşkun, Emre"
Now showing 1 - 2 of 2
Results Per Page
Sort Options
Article A new method to determine the continuous refractive index of an absorbing film by Generalized Stockwell Transform(Optics and Laser Technology, 2023-12) Coşkun, Emre; Emir, Cansu; Selamet, Semanur; Parlak, Mehmet; Özder, SerhatGeneralized Stockwell Transform (GST) was adapted to analyze a transmittance signal to continuously determine the refractive index and extinction coefficient. The process is built by analyzing oscillation frequencies of the transmission signal where oscillations exist. The simulation studies clearly show the advantage of the locally referenced phase property of the presented method. The validity of the method was checked for a CdS thin film. The results determined by the GST method are consistent with the results determined by envelope and other signal analyzing methods, and the literature. The noise and relative error analysis of the method was also discussed.Article Structural and Optical Properties of Interfacial InSe Thin Film(ACS Omega, 2024-02-09) Emir, Cansu; Tataroğlu, Adem; Coşkun, Emre; Ocak, Sema BilgeThis study presents a comprehensive investigation of the optical and structural characteristics of the indium selenide (InSe) film prepared on a glass substrate. The structural characteristics of the InSe film were analyzed using characterization techniques including X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy while the UV–vis spectrophotometry method was used in the spectral range between 500 and 1000 nm to examine the optical characteristics. Thus, the UV–vis spectroscopic data were used to extract several optical parameters including extinction coefficient (k), optical band gap (Eg), refractive index (n), absorption coefficient (α), and optical conductivity (σopt). The optical transition of InSe was found as a direct transition. However, the optical analysis of this study has revealed that the InSe film has the potential to be used in various optoelectronic and photovoltaic applications.