title: Complete polarization characterization of single plasmonic nanoparticle enabled by a novel Dark-field Mueller matrix spectroscopy system.
abstract: Information on the polarization properties of scattered light from plasmonic systems are of paramount importance due to fundamental interest and potential applications. However, such studies are severely compromised due to the experimental difficulties in recording full polarization response of plasmonic nanostructures. Here, we report on a novel Mueller matrix spectroscopic system capable of acquiring complete polarization information from single isolated plasmonic nanoparticle/nanostructure. The outstanding issues pertaining to reliable measurements of full 4 × 4 spectroscopic scattering Mueller matrices from single nanoparticle/nanostructures are overcome by integrating an efficient Mueller matrix measurement scheme and a robust eigenvalue calibration method with a dark-field microscopic spectroscopy arrangement. Feasibility of quantitative Mueller matrix polarimetry and its potential utility is illustrated on a simple plasmonic system, that of gold nanorods. The demonstrated ability to record full polarization information over a broad wavelength range and to quantify the intrinsic plasmon polarimetry characteristics via Mueller matrix inverse analysis should lead to a novel route towards quantitative understanding, analysis/interpretation of a number of intricate plasmonic effects and may also prove useful towards development of polarization-controlled novel sensing schemes.
authors.affiliation: Department of Physical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur- 741246, India.
authors.forename: Shubham
authors.initials: S
authors.lastname: Chandel
authors.affiliation: Department of Physical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur- 741246, India.
authors.forename: Jalpa
authors.initials: J
authors.lastname: Soni
authors.affiliation: Department of Physical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur- 741246, India.
authors.forename: Subir Kumar
authors.initials: SK
authors.lastname: Ray
authors.affiliation: Department of Physical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur- 741246, India.
authors.forename: Anwesh
authors.initials: A
authors.lastname: Das
authors.affiliation: Department of Physical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur- 741246, India.
authors.forename: Anirudha
authors.initials: A
authors.lastname: Ghosh
authors.affiliation: Department of Physical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur- 741246, India.
authors.forename: Satyabrata
authors.initials: S
authors.lastname: Raj
authors.affiliation: Department of Physical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur- 741246, India.
authors.forename: Nirmalya
authors.initials: N
authors.lastname: Ghosh