Nanocomposites and nanomaterials

Chromium nanofilms on a glass substrate: the elements M12 and M43 of the Mueller matrix

Yevgen Oberemok1, Sergey Savenkov1, Chen Xiaohong2, Zhao Zhenjie2, Sun Zhuo2, Andrii Sizhuk1, Oleksandr Prokopenko1
1Taras Shevchenko Kyiv National University, Glushkova ave. 4g, Kyiv, Ukraine
E-mail: oberemok.ye@gmail.com
2 Shanghai East China Normal University, Shanghai, China
The set of chromium nanofilms, with the layer thickness from 130 nm to 190 nm, was deposited by the method of a thermal sputtering on glass plates. The Mueller matrix elements for the set of chromium nanofilms are calculated based on the ellipsometry of the incident and reflected light beams at the four initial polarization states. Normalized elements M12 and M43 of the Mueller matrix as the functions of the angle of incidence at the film, presumably 132 nm thick, are depicted in the graph Fig. 1 below. The light beam was generated by a He-Ne laser (at about 633 nm wavelength). The nanofilms are opaque for the laser beam with the power of 15 mW. A significant dependence on the thickness of the nanofilms was not observed for the matrix elements. The age of the samples is about 1 year. 

Fig. 1. Normalized elements M12 and M43 of the Mueller matrix as the function of the angle of incidence at the chromium nanofilm (sputtered during the time interval 5 minutes, corresponding to the estimated thickness of 132 nm).