Open AccessOptical nonlinearities of iron films prepared by pulsed laser deposition
Author(s) -
Weitian Wang,
Dexin Guan,
Zhou Yue-Liang,
Hangjun Lu,
Zhenghao Chen
Publication year - 2005
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.54.3429
Subject(s) - materials science , thin film , pulsed laser deposition , diffraction , impurity , laser , wavelength , optics , attenuation coefficient , deposition (geology) , surface roughness , analytical chemistry (journal) , surface finish , absorption (acoustics) , optoelectronics , nanotechnology , composite material , paleontology , chemistry , physics , organic chemistry , chromatography , sediment , biology
Thin films of iron were fabricated on MgO(100) substrates using pulsed laser dep osition technique. The crystalline property and surface roughness of the films w ere investigated by x-ray diffraction and atomic force microscopy, respectively . It is found that the Fe films deposited at 500 and 800℃ are of single phase, and no diffraction from randomly oriented grains or impurity phases can be obser ved. The nonlinear optical properties of continuous 9 nm-thick iron film were d etermined using the z-scan method. The results show that the ultra-thin ir on film exhibits large nonlinear refractive coefficient, n2= 709×1 0-5cm2/kW, and nonlinear absorption coefficient, β=-552×10 -3(cm/W), at the wavelength of 532 nm.