Share Email Print
cover

Proceedings Paper

Mueller matrix polarimetry of plasmon resonant silver nano-rods: biomedical prospects
Author(s): Jalpa Soni; Sayantan Ghosh; Sudipta K. Bera; Ayan Banerjee; Nirmalya Ghosh
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Fundamental understanding of the light-matter interaction in the context of nano-particles is immensely benefited by the study of geometry dependent tunable Localized Surface Plasmon Resonance (LSPR) and has been demonstrated to have potential applications in various areas of science. The polarization characteristics of LSPR in addition to spectroscopic tuning can be suitably exploited in such systems as contrast enhancement mechanisms and control parameters. Such polarization characteristics like diattenuation and retardance have been studied here using a novel combination of Muller-matrix polarimetry with the T-matrix matrix approach for silver nano-rods to show unprecedented control and sensitivity to local refractive index variations. The study carried out over various aspect ratios for a constant equal volume sphere radius shows the presence of longitudinal (dipolar and quadrupolar) and transverse (dipolar) resonances; arising due to differential contribution of polarizabilities in two directions. The overlap regions of these resonances and the resonances themselves exhibit enhanced retardance and diattenuation respectively. The spectral and amplitude tunability of these polarimetric parameters through the aspect ratios to span from the minimum to maximum ([0, 1] in the case of diattenuation and [0, π] in the case of retardance) presents a novel result that could be used to tailor systems for study of biological media. On the other hand, the high sensitivity of diattenuation dip (caused by equal contribution of polarizabilities) could be possibly used for medium characterization and bio-sensing or bio imaging studies.

Paper Details

Date Published: 26 February 2013
PDF: 8 pages
Proc. SPIE 8699, Saratov Fall Meeting 2012: Optical Technologies in Biophysics and Medicine XIV; and Laser Physics and Photonics XIV, 869902 (26 February 2013); doi: 10.1117/12.2016830
Show Author Affiliations
Jalpa Soni, Indian Institute of Science Education and Research Kolkata (India)
Sayantan Ghosh, Indian Institute of Science Education and Research Kolkata (India)
Sudipta K. Bera, Indian Institute of Science Education and Research Kolkata (India)
Ayan Banerjee, Indian Institute of Science Education and Research Kolkata (India)
Nirmalya Ghosh, Indian Institute of Science Education and Research Kolkata (India)


Published in SPIE Proceedings Vol. 8699:
Saratov Fall Meeting 2012: Optical Technologies in Biophysics and Medicine XIV; and Laser Physics and Photonics XIV
Valery V. Tuchin; Elina A. Genina; Vladimir L. Derbov; Igor V. Meglinski, Editor(s)

© SPIE. Terms of Use
Back to Top