کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1494171 1510797 2014 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Transparent amorphous zinc oxide thin films for NLO applications
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Transparent amorphous zinc oxide thin films for NLO applications
چکیده انگلیسی


• Amorphous ZnO thin films were grown using sol–gel technique.
• X-Ray and AFM images were measured to investigate the structural properties.
• Photoluminescence spectra and decay lifetime curves have been measured.
• The SH and TH spectra were measured to investigate the NLO properties.
• Second and third order nonlinear susceptibilities were calculated.

This review focuses on the growth and optical properties of amorphous zinc oxide (ZnO) thin films. A high quality ZnO films fabricated by dip-coating (sol–gel) method were grown on quartz and glass substrates at temperature equal to 350 K. The amorphous nature of the films was verified by X-ray diffraction. Atomic Force Microscopy was used to evaluate the surface morphology of the films. The optical characteristics of amorphous thin films have been investigated in the spectral range 190–1100 nm. Measurement of the polarized optical properties was shows a high transmissivity (80–99%) and low absorptivity (<5%) in the visible and near infrared regions at different angles of incidence. Linear optical properties were investigated by classic and Time-Resolved Photoluminescence (TRPL) measurements. Photoluminescence spectrum exhibits a strong ultraviolet emission while the visible emission is very weak. An innovative TRPL technique has enabled the measurement of the photoluminescence decay time as a function of temperature. TRPL measurements reveal a multiexponential decay behavior typical for amorphous thin films. Second and third harmonic generation measurements were performed by means of the rotational Maker fringe technique using Nd:YAG laser at 1064 nm in picosecond regime for investigations of the nonlinear optical properties. The obtained values of second and third order nonlinear susceptibilities were found to be high enough for the potential applications in the optical switching devices based on refractive index changes. Presented spectra confirm high structural and optical quality of the investigated zinc oxide thin films.

Figure optionsDownload high-quality image (105 K)Download as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 37, November 2014, Pages 327–337
نویسندگان
, , , ,