{"title":"Improvement in optical nonlinearity of spiral square Mn-based nanostructures with increasing the number of square sides","authors":"Fahimeh Abrinaei , Mahsa Fakharpour","doi":"10.1016/j.ijleo.2024.171919","DOIUrl":null,"url":null,"abstract":"<div><p>Spiral square Mn-based nanostructures with different numbers of square sides were grown on glass substrate using the glancing angle deposition method. The crystallinity of the products was determined by X-ray diffraction. The surface properties of the synthesized nanostructures were analyzed by field emission scanning electron microscopy (FESEM) and atomic force microscopy (AFM). 2D AFM images have been used for more detail on grain growth evolution and height distribution. The band gaps of the nanostructures were determined using the Tauc formula in the range of 2.72–3.06 eV. It was observed a decrease in band gap energy of spiral square Mn-based nanostructures with increasing the number of square sides. Nonlinear optical measurements of synthesized samples were performed using a Z-scan setup under a CW laser irradiated at 532 nm. Values of the order of 10<sup>−4</sup> cm W<sup>−1</sup> and 10<sup>−7</sup> cm<sup>2</sup> W<sup>−1</sup> were calculated for nonlinear absorption coefficients and refraction indices of spiral square nanostructures, respectively. This investigation revealed an increase of about 1.7 times for nonlinear optical parameters of Mn-based nanostructures with increasing the number of square sides from 8 up to 10 that is significant increment. These results suggest spiral square Mn-based nanostructures as a potential material for application in optics.</p></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":null,"pages":null},"PeriodicalIF":3.1000,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optik","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0030402624003188","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"Engineering","Score":null,"Total":0}
引用次数: 0
Abstract
Spiral square Mn-based nanostructures with different numbers of square sides were grown on glass substrate using the glancing angle deposition method. The crystallinity of the products was determined by X-ray diffraction. The surface properties of the synthesized nanostructures were analyzed by field emission scanning electron microscopy (FESEM) and atomic force microscopy (AFM). 2D AFM images have been used for more detail on grain growth evolution and height distribution. The band gaps of the nanostructures were determined using the Tauc formula in the range of 2.72–3.06 eV. It was observed a decrease in band gap energy of spiral square Mn-based nanostructures with increasing the number of square sides. Nonlinear optical measurements of synthesized samples were performed using a Z-scan setup under a CW laser irradiated at 532 nm. Values of the order of 10−4 cm W−1 and 10−7 cm2 W−1 were calculated for nonlinear absorption coefficients and refraction indices of spiral square nanostructures, respectively. This investigation revealed an increase of about 1.7 times for nonlinear optical parameters of Mn-based nanostructures with increasing the number of square sides from 8 up to 10 that is significant increment. These results suggest spiral square Mn-based nanostructures as a potential material for application in optics.
期刊介绍:
Optik publishes articles on all subjects related to light and electron optics and offers a survey on the state of research and technical development within the following fields:
Optics:
-Optics design, geometrical and beam optics, wave optics-
Optical and micro-optical components, diffractive optics, devices and systems-
Photoelectric and optoelectronic devices-
Optical properties of materials, nonlinear optics, wave propagation and transmission in homogeneous and inhomogeneous materials-
Information optics, image formation and processing, holographic techniques, microscopes and spectrometer techniques, and image analysis-
Optical testing and measuring techniques-
Optical communication and computing-
Physiological optics-
As well as other related topics.