Defect assisted nonlinear absorption and optical limiting in amorphous TlGaS2 (1-x) Se2 (x)(0⩽ x⩽ 1) thin films

BA Ünlü, A Karatay, EA Yildiz, T Dinçbay, H Ünver… - Journal of …, 2022 - Elsevier
In an attempt to investigate the effect of band gap energy and defect states on nonlinear
absorption, 80 nm thick amorphous TlGaS 2 (1-x) Se 2 (x) thin films with different …

Wavelength dependence of the nonlinear absorption performance and optical limiting in Bi12TiO20 single crystal

Y Pepe, M Isik, A Karatay, N Gasanly, A Elmali - Journal of Luminescence, 2023 - Elsevier
In this study, the influence of excitation wavelength and input intensity on the nonlinear
absorption (NA) mechanism and optical limiting behavior of the Bi 12 TiO 20 (BTO) single …

Tuning the energy bandgap and nonlinear absorption coefficients of CdO nanocomposite films with do** and annealing process

Y Pepe, A Karatay, YO Donar, A Sınağ, H Unver… - Optical Materials, 2020 - Elsevier
The effects of do** and annealing on the linear and nonlinear optical properties of CdO,
CdO: Cr and CdO: Sb nanocomposite films are investigated. The nanoparticles were …

One-photon absorption enhanced nonlinear absorption and optical limiting of the electrospun polyvinylpyrrolidone via excitation energy and incorporation of …

Y Pepe, S Akkoyun, B Bozkurt, A Karatay… - Journal of Materials …, 2022 - Springer
Recently, we have shown defect-assisted nonlinear absorption and optical limiting in
semiconducting polymers due to one-photon, two-photon absorption (via the sequential …

Thermally Induced Phase Transition and Defect‐Assisted Nonlinear Absorption and Optical Limiting in Nanorod Morphology V2O5 Thin Films

Y Pepe, Y Tutel, EA Yildiz, A Karatay… - Advanced …, 2021 - Wiley Online Library
Vanadium pentoxide (V2O5) thin films are greatly favorable materials for optoelectronic
applications due to their broad optical bandgap and considerable thermal and chemical …

Enhanced nonlinear absorption coefficient and low optical limiting threshold of NiO nanocomposite films

Y Pepe, A Karatay, YO Donar, EA Yildiz, A Sınağ… - Optik, 2021 - Elsevier
In order to enhance the optical nonlinearity of the nickel oxide, NiO nanoparticles doped with
Cr/Sb were synthesized by hydrothermal method. Their nanocomposite films which have …

Enhancement of nonlinear absorption in defect controlled ZnO polycrystalline thin films by means of Co‐do**

BA Ünlü, D Sener, S Tekin, EA Yildiz… - … status solidi (b), 2021 - Wiley Online Library
The structural, optical, and nonlinear optical absorption properties of ZnO polycrystalline thin
films are investigated. Energy bandgap values are obtained with linear absorption spectrum …

Morphology, defects and polymer concentration related nonlinear absorption and optical limiting properties of electrospun polyamide 6 nanofibers

Y Pepe, S Akkoyun, A Karatay, EA Yildiz… - Journal of Applied …, 2022 - Wiley Online Library
The effects of morphology, defects and polymer concentration on nonlinear absorption
characteristics of electrospun polyamide 6 (PA 6) nanofibers were studied systematically …

The role of defects on the transition from saturable absorption to nonlinear absorption of Bi12GeO20 single crystal under increasing laser excitation

Y Pepe, M Isik, A Karatay, EA Yildiz, N Gasanly… - Journal of …, 2022 - Elsevier
This work reports defect and input intensity dependent nonlinear optical behaviors of Bi 12
GeO 20 (BGO) single crystal. Open aperture (OA) Z-scan experiments were performed with …

Thermal annealing and dopant dependence of nonlinear absorption characteristics in ZnO Nanoparticle/PMMA films

Y Pepe, A Karatay, YO Donar, S Bilge, A Elmali… - Optical Materials, 2020 - Elsevier
Abstract Cr and Sb doped ZnO/PMMA nanocomposite films were investigated to understand
the effect of do** and annealing on linear and nonlinear optical properties. ZnO, ZnO: Cr …