Akademik Veri Yönetim Sistemi
Journal of Materials Science: Materials in Electronics, cilt.37, sa.9, 2026 (SCI-Expanded, Scopus)
In this study, we investigated the nonlinear optical response of TiS2 nanosheet-based thin films prepared by the ultrasonic spray deposition method, with particular emphasis on their saturable absorption (SA) behavior, which plays a key role in ultrafast photonic applications. Z-scan measurements under interband excitation revealed that the interplay between SA and excited-state absorption (ESA) strongly depends on the film thickness. To more accurately describe the observed behavior, a comprehensive model incorporating one photon absorption (OPA), two photon absorption (TPA), and ESA mechanisms was employed alongside the traditional SA model. The findings show that TiS2 films can be tailored to operate efficiently across a broad range of optical intensity regimes, from low to high, through precise control of film thickness. This versatility makes them promising candidates for Q-switching and mode-locking in ultrafast photonic devices.