title: Polarizing effect of aligned nanoparticles in terahertz frequency region.
abstract: We report the polarizing behavior of aligned Ni nanoparticles (NPs) having average diameter of 165±15 nm in ~210 μm thick polyvinyl alcohol (PVA) matrix in the frequency range of 0.2-1.6 THz. The NPs have been prepared via a wet chemical route and then aligned in PVA film by using an external magnetic field. When the polarization of THz electric field is parallel to the NPs alignment direction, a strong THz absorption is observed whereas a minimum THz absorption is noticed for the corresponding perpendicular configuration. Degree of polarization is calculated to be 0.9±0.08. Considering the good polarizing performance, ease of preparation, durability, and low maintenance, this aligned NP system is a perfect candidate to emerge as a potential THz polarizer.
authors.affiliation: Department of Chemical, Biological and Macromolecular Sciences, Unit for Nano Science and Technology, S. N. Bose National Centre for Basic Sciences, Salt Lake, Kolkata, India.
authors.forename: Debanjan
authors.initials: D
authors.lastname: Polley
authors.forename: Arnab
authors.initials: A
authors.lastname: Ganguly
authors.forename: Anjan
authors.initials: A
authors.lastname: Barman
authors.forename: Rajib Kumar
authors.initials: RK
authors.lastname: Mitra