Abstract
In this work, we have shown that by engineering of the morphology of a manganese thin film as a star-like helical sculptured thin film (pine tree shaped) (SHSTF), three broad band absorption transitions from dielectric to metal can be obtained. The structural and morphological changes of the produced samples in three- and five-pointed SHSTFs are obtained by means of field emission scanning electron microscope (FESEM) and atomic force microscope (AFM) analyses. The experimental optical absorption results are compared with the predictions of our proposed model based on linearly polarized light propagation by a transfer matrix method, and good qualitative results are obtained. This study can be a base for the characterization of optical and plasmonic properties of devices with broad band absorption and trapping of light in photocells.
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Acknowledgements
This work was carried out with the support of the University of Tehran and University of Qom. HS acknowledges the University of Tehran and is grateful to the Iran National Science Foundation (INSF) and the Centre of Excellence for Physics of Structure and Microscopic Properties of Matter, Department of Physics, University of Tehran, for partial support of this work.
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Babaei, F., Savaloni, H. Optical Absorption Transitions in Mn Star-like Helical Sculptured Thin Films. Plasmonics 13, 203–214 (2018). https://doi.org/10.1007/s11468-017-0500-x
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DOI: https://doi.org/10.1007/s11468-017-0500-x