Title: Modifications of optical properties in doped germanene nanosheet

Authors: Namrata Dhar; Debnarayan Jana

Addresses: Department of Physics, University of Calcutta, 92 Acharya Prafulla Chandra Road, Kolkata 700009, India ' Department of Physics, University of Calcutta, 92 Acharya Prafulla Chandra Road, Kolkata 700009, India

Abstract: Optical properties, like complex dielectric constant, absorption coefficient, refractive index and reflectivity have been analysed via density functional theory (DFT) of As and Ga doped free standing (FS) germanium (Ge) nanosheet. Position dependent (same or different sub-lattice positions) doping mechanism of foreign elements along with concentration variation up to 6.25%, in pristine germanene layer has been adopted for the whole work. Interesting modifications in optical anisotropy than pristine layer have been observed as a consequence of doping. Such modifications, like enhancement or reduction of peak intensity or shifting of peak positions may be useful to design smart germanene based opto-electronics devices in upcoming future.

Keywords: germanene; density functional theory; optical properties.

DOI: 10.1504/IJNBM.2017.089321

International Journal of Nano and Biomaterials, 2017 Vol.7 No.1, pp.29 - 37

Received: 24 Feb 2017
Accepted: 27 Jul 2017
Published online: 17 Jan 2018 *

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