Polarizing effect of aligned nanoparticles in terahertz frequency region

Debanjan Polley; Arnab Ganguly; Anjan Barman; Rajib Kumar Mitra

doi:10.1364/OL.38.002754

Polarizing effect of aligned nanoparticles in terahertz frequency region

Debanjan Polley
, Arnab Ganguly
, Anjan Barman
, Rajib Kumar Mitra

Unit for Nano Science and Technology
S.N. Bose National Centre for Basic Sciences

Research output: Contribution to journal › Article › peer-review

32 Scopus citations

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.

Original language	British English
Pages (from-to)	2754-2756
Number of pages	3
Journal	Optics Letters
Volume	38
Issue number	15
DOIs	https://doi.org/10.1364/OL.38.002754
State	Published - 1 Aug 2013

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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.",

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AB - 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.

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Polarizing effect of aligned nanoparticles in terahertz frequency region

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