Browsing Nanoteknoloji Mühendisliği Bölümü Makale Koleksiyonu by Author "Altuntaş İsmail"
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Comprehensive growth and characterization study of GeOx/Si
Baghdedi Dhouha; Hopoğlu Hicret; Sarıtaş Sevda; Demir İlkay; Altuntaş İsmail; Abdelmoula Najmeddine; Gür Emre; Şenadım Tüzemen Ebru (15.02.2023)In this study, the reactive radio frequency magnetron sputtering (RFMS) method under varying thickness was used to deposit GeO x on Si substrate at room temperature. The effect of thickness on the structural and optical ... -
Determination of Optical Properties of MOVPE-Grown InxGa1-xAs/InP Epitaxial Structures by Spectroscopic Ellipsometry
Kaynar Emine; Sayrac, Muhammed; Altuntaş İsmail; Demir İlkay (Springer, 2022)InxGa1−xAs epitaxial layers with different AsH3 flows have been grown on InP substrate with the MOVPE system. It has been found that AsH3 flow variation affects the In concentration of InGaAs/InP structure because the ... -
Effect of substrate temperature on Raman study and optical properties of GeOx/ Si thin films
Baghdedi Dhouha; Hopoğlu Hicret; Demir İlkay; Altuntaş İsmail; Abdelmoula Najmeddine; Şenadım Tüzemen Ebru (14.10.2023)In this study, GeOx thin films were deposited onto Si substrates using the RF magnetron sputtering method. We looked at how the temperature of the substrate affected the Raman spectra and optical characteristics of ... -
Experimental insights toward carrier localization in in-rich InGaAs/InP as candidate for SWIR detection: Microstructural analysis combined with optical investigation
Arbia Marwa Ben; Demir İlkay; Kaur Navpreet; Saidi Faouzi; Zappa Dario; Comini Elisabetta; Altuntaş İsmail; Maaref Hassen (15.01.2023)Hyperspectral imaging has been flourished thanks to the huge investigation of the infrared spectrum from NIR to LWIR bands. The ternary InGaAs has been investigated herein in the context of studying the structural ... -
High-quality AlN growth: a detailed study on ammonia flow
Yolcu Gamze; Koçak Merve Nur; Ünal Dudu Hatice; Altuntaş İsmail; Demir İlkay (25.01.2023)High crystalline and optical quality aluminum nitride (AlN) films with thin thickness have been grown on Al2O3 by MOVPE (metal-organic vapor phase epitaxy) and the NH3 flow rate has been changed to improve the morphology and ... -
Investigating the optical, electronic, magnetic properties and DFT of NiO films prepared using RF sputtering with various argon pressures
Hopoğlu Hicret; Dogan Kaya; Maslov Mikhail M.; Kaya Savas; Demir İlkay; Altuntaş İsmail; Ungan Fatih; Akyol Mustafa; Ekicibil Ahmet; Şenadım Tüzemen Ebru (23.04.2023)In this study, we investigated the structural, optical, magnetic, and conductive properties of nickel oxide (NiO) films on glass substrates deposited using Radio Frequency (RF) magnetron sputtering with varying Ar ... -
Modeling of temperature‑dependent photoluminescence of GaN epilayer by artificial neural network
Şenadım Tüzemen Ebru; Yüksek Ahmet Gürkan; Demir İlkay; Horoz Sabit; Altuntaş İsmail (22.06.2023)Artificial neural networks (ANNs) are a type of machine learning model that are designed to mimic the structure and function of biological neurons. They are particularly well-suited for tasks such as image and speech ...