Issue 63, 2016

Polarized Raman spectra of phosphorene in edge and top view measuring configurations

Abstract

We demonstrate the anisotropic features of the A1g, B2g and A2g vibrational Raman modes of phosphorene by performing for the first time a comparison of two orthogonal polarized Raman scattering studies in edge and top view measuring configurations. Despite the orthogonality between the vibration modes of A1g and A2g, they exhibit intense and very weak Raman intensities under light polarized along and transverse to the armchair edge, respectively, while the B2g mode is virtually non-existent. The B2g mode significantly appears only in the top view configuration. The studies performed under different intensities of excited light in the top view configuration are detailed for the sample rotated at 0°, 40°, 80° and 130° about the incident laser beam. The studies reveal a quadratic opposite behavior of the A2g and B2g modes and an unusual angle dependence of the A1g vibrational mode. An unexpected behavior of the A2g Raman mode at higher intensities, which still persists for the A1g mode, is shown. The anomalous behavior of the A1g mode from the edge and top view and the A2g mode in the top view configuration is explained in terms of the layer stacking structures of phosphorene.

Graphical abstract: Polarized Raman spectra of phosphorene in edge and top view measuring configurations

Article information

Article type
Paper
Submitted
14 Apr 2016
Accepted
08 Jun 2016
First published
10 Jun 2016

RSC Adv., 2016,6, 58003-58009

Polarized Raman spectra of phosphorene in edge and top view measuring configurations

M. Baibarac, A. Nila and I. Baltog, RSC Adv., 2016, 6, 58003 DOI: 10.1039/C6RA09682D

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