Nonlinear optical properties of erbium doped zinc oxide (EZO) thin films |
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| Authors: | Vinay Kumari Vinod Kumar BP Malik RM Mehra Devendra Mohan |
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| Institution: | 1. Department of Physics, BMIET, Sonepat, 131001, India;2. Department of Physics, Gurukula Kangri University, Haridwar, 249404, India;3. Department of Physics, DCRUST, Murthal, 131027, India;4. School of Engineering and Technology, Sharda University, Greater Noida, 201306, India;5. Department of Applied Physics, GJUS&T, Hissar, 125001, India;6. Materials Science Group, Inter University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi 110067, India;1. ESIQIE, Instituto Politécnico Nacional, Zacatenco, México, D.F. 07738, Mexico;2. Sección de Estudios de Posgrado e Investigación, ESIME-Z, Instituto Politécnico Nacional, México, D.F. 07738, Mexico;3. Instituto de Astronomía, Universidad Nacional Autónoma de México, Ensenada, B.C. 22860, Mexico;4. Depto. de Óptica, Centro de Investigación Científica y de Educación Superior de Ensenada, A.P. 360, Ensenada, B.C. 22860, Mexico;1. Kastamonu University, Faculty of Arts and Sciences, Department of Physics, 37100 Kastamonu, Turkey;2. Kastamonu University, Research and Application Center, 37100 Kastamonu, Turkey;3. Bahcesehir University, Faculty of Engineering and Natural Sciences, 34349 Besiktas, Istanbul, Turkey;4. Kastamonu University, Faculty of Engineering and Architecture, Department of Machine Engineering, 37100 Kastamonu, Turkey;5. Abant Izzet Baysal University, Faculty of Arts and Sciences, Department of Physics, 14280 Bolu, Turkey;1. National University of Science and Technology MISIS, Leninskii pr. 4, Moscow, 119049, Russia;2. Materials Research Laboratory, Department of Physics, National Institute of Technology Karnataka, Surathkal, DK, Karnataka, 575025, India;3. Department of Physics, School of Engineering and Technology, Jain University, Bangalore, Karnataka, 562112, India;4. Nonlinear Optics Research Laboratory, Department of Physics, Manipal Institute of Technology, Manipal University, Manipal, Karnataka, 576104, India |
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| Abstract: | Undoped and Erbium (Er) doped zinc oxide (EZO) thin films were deposited on glass substrate by sol–gel method using spin coating technique with different doping concentration. EZO films were characterized using X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), UV–VIS-NIR transmission and single beam z scan method under illumination of frequency doubled Nd:YAG laser. The deposited films were found to be well crystallized with hexagonal wurtzite structure having a preferential growth orientation along the ZnO (002) plane. A blue-shift was observed in the band gap of EZO films with increasing Er concentration. All the films exhibited a negative value of nonlinear refractive index (n2) at 532 nm which is attributed to the two photon absorption and weak free carrier absorption. Third order nonlinear optical susceptibility, χ(3) values of EZO films were observed in the remarkable range of 10? 6 esu. EZO (0.4 at.%) sample was found to be the best optical limiter with limiting threshold of 1.95 KJ/cm2. |
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