Optical nonlinearity of ZnO microcrystallite enhanced by interfacial state

Abstract

A series of ZnO microcrystallite films deposited on quartz substrates were annealed at the temperature of 600~1050 masculineC. A well c-axis grown wurtzite ZnO film was obtained at the annealing temperature of 850 masculineC. For the samples annealed above this temperature, the empirical parameter E(0) increased calculated from transmittance spectra, which indicated the changes of the interface of ZnO microcrystallite. Measured by Z-scans, the nonlinear absorption coefficient beta(eff) increased from 1.2x10(2) cm/GW to 1.1x10(3) cm/GW when the annealing temperature rose from 950 masculineC to 1050 masculineC, mainly due to the interfacial state enhancement.

Third-order optical nonlinearities in anatase and rutile TiO2 thin films

“…However, a drawback of this kind of films is the thermal damage and light loss induced by the large resonance absorption. Recently, as a candidate for nonlinear optical materials, metal oxide thin films have attracted growing interest due to the high optical nonlinearity, fast response time, and low absorption index [3][4][5].…”

Near-resonant high order nonlinear absorption of ZnO thin films

“…The nonlinear processes induced by TPA-excited charge carriers [10] and the multi-photon absorption (including two photon and three photon absorption) induced PL emission of ZnO under intense femtosecond excitation [11] had been reported. With the different effects on photonic devices, enhancement of optical nonlinearity on ZnO was also studied in various situations such as at two-photon exciton resonance [9] and at distinct interfacial state [12].…”

Surface Modification of Bacterial Cellulose by Copper and Zinc Oxide Sputter Coating for UV-Resistance/Antistatic/Antibacterial Characteristics

“…Zinc oxide is a common element in many sunscreens, which converts ultraviolet radiation to infrared, yet infrared could be dangerous depending on the exposure [30].The application of a zinc oxide nanocomposite has been studied extensively in terms of optical, electrical, optoelectronic and photochemical characteristics. The high energy surface area of zinc oxide nanocomposites presents excellent characteristics in the applications of sensing devices, color creation and antimicrobial materials [31][32][33][34].The fabrication of metallic and metallic oxide nanoparticles on polymers and cellulosic materials has been reported with several methods and techniques, among which are hydrothermal, sol-gel, chemical deposition, photoreduction and laser deposition methods, according to applications [35][36][37][38][39]. Meanwhile, high temperatures, high pressures, costly machines, harmful elements and high process times are those factors which limit the material applications.…”

“…The application of a zinc oxide nanocomposite has been studied extensively in terms of optical, electrical, optoelectronic and photochemical characteristics. The high energy surface area of zinc oxide nanocomposites presents excellent characteristics in the applications of sensing devices, color creation and antimicrobial materials [31][32][33][34].…”