Influence of static electric field on Raman polarizability of optically trapped polystyrene beads

Adarsh U K; Aseefhali Bankapur; Mahendra Acharya; Santhosh Chidangil

doi:10.1016/j.saa.2019.117726

Influence of static electric field on Raman polarizability of optically trapped polystyrene beads

Spectrochim Acta A Mol Biomol Spectrosc. 2020 Mar 5:228:117726. doi: 10.1016/j.saa.2019.117726. Epub 2019 Nov 1.

Authors

Adarsh U K¹, Aseefhali Bankapur², Mahendra Acharya¹, Santhosh Chidangil¹

Affiliations

¹ Centre for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, 576104, India.
² Centre for Biophotonics, Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal, 576104, India. Electronic address: [email protected].

PMID: 31757699
DOI: 10.1016/j.saa.2019.117726

Abstract

The influence of static electric field of about 4.9 kV/cm on optically trapped polystyrene bead has been studied using micro-Raman spectroscopy. This experimental method could explore the response of electronic polarizability of molecules to the static electric field by measuring the Raman intensity. It is observed that, the atomic electrons in polystyrene will polarize to the extent that they induce a Raman intensity enhancements by a factor ranging from 0.004 to 0.64 for various spectral bands of polystyrene when exposed to the electric field from ~4.90 to 4.96 kV/cm.

Keywords: Micro-Raman spectroscopy; Optical trapping; Polystyrene beads; Raman polarizability; Static electric field.