Proceedings ArticleDOI
Imaging of polarization rotation in transmission resonances of periodic plasmonic structures
Pankaj Arora,A. Krishnan +1 more
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TLDR
In this paper, the authors used a cross-axis polarizer analyzer to measure the polarization rotation of transmitted light in 1D Periodic Plasmonic Structures (PPS) fabricated on thin metal coated dielectric substrate.Abstract:
We imaged polarization rotation of transmitted light in 1D Periodic Plasmonic Structures (PPS) fabricated on thin metal coated dielectric substrate. Several PPS of 50% duty cycle and extremely low aspect ratio (height to width ratio) of 0.1 were designed using rigorous coupled wave analysis to exhibit transmission plasmonic resonances at optical wavelengths (400 nm to 700 nm). PPS were fabricated using electron beam lithography, evaporation and lift-off process on glass substrates coated with thin metal. The PPS were characterized using normally incident broadband visible light and crossaxis Polarizer Analyzer setup, with the transmitted light imaged in direct and momentum space using a camera. When the cross axis Polarizer Analyzer were positioned at +45° & -45° respectively w.r.t. plane of incidence, bright emissions of Green, Yellow or Red colors corresponding to transmission plasmonic resonances of the PPS with different periods, were observed in both direct and Fourier planes, instead of completely dark images. From the measured emission momentum in Fourier plane images and spectra of collected light, the emissions were attributed to the excitations of surface plasmons and the reason for surface plasmon excitation in this arrangement is strong coupling of hybrid modes with each other caused by the anisotropy introduced by grating which strongly enhances the efficiency of Polarization rotation. The presented structures behave as frequency selective half wave plates in transmission configuration and could also be used to eliminate the effect of direct beam while imaging the coupling to surface plasmons in periodic structures.read more
Citations
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Journal ArticleDOI
Imaging the Engineered Polarization States of Surface Plasmon Polaritons at Visible Wavelengths
Pankaj Arora,A. Krishnan +1 more
TL;DR: In this article, a thin homogeneous metal layer was sandwiched between the substrate and the periodic metal patterns to outcouple the SPPs as leakage radiation through the substrate, which resulted in the detection of SPP excitation as transmission peaks in a dark background.
Journal ArticleDOI
A birefringent etalon enhances the Faraday rotation of thin magneto-optical films
Evangelos Almpanis,Petros Andreas Pantazopoulos,Nikolaos Papanikolaou,Vassilios Yannopapas,Nikolaos Stefanou +4 more
Journal ArticleDOI
Use of nanostructures based on silver nanospike prepared by oblique angle deposition as broadband optical polarizer
TL;DR: In this article, a polycarbonate grating comprising silver nanospikes prepared by an oblique angle deposition technique was used to construct nanostructures for optical polarizers.
References
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Alexandre Vial,Anne-Sophie Grimault,Demetrio Macías,Dominique Barchiesi,Marc Lamy de la Chapelle +4 more
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Efficient and broadband quarter-wave plates by gap-plasmon resonators
TL;DR: It is demonstrated numerically that metal-insulator-metal (MIM) configurations in which the top metal layer consists of a periodic arrangement of nanobricks, thus facilitating gap-surface plasmon resonances, can be designed to function as efficient and broadband quarter-wave plates in reflection by a proper choice of geometrical parameters.
Journal ArticleDOI
Polarisation Conversion through the Excitation of Surface Plasmons on a Metallic Grating
TL;DR: In this paper, the authors used a grating to provide the necessary extra momentum to accelerate the plasmon-polaritons at a metal-air boundary, and obtained a p-s conversion of up to 66% for silver-coated gratings of appropriate depth.
Journal ArticleDOI
Plasmonic wave plate based on subwavelength nanoslits
TL;DR: It is shown that the predictions for the phase shift obtained from a semianalytical model are in very good agreement with simulations by the finite difference time domain method.
Journal ArticleDOI
Image Formation in Wide-Field Microscopes Based on Leakage of Surface Plasmon-Coupled Fluorescence
TL;DR: In this paper, a proof-of-concept imaging technique that combines the advantages of wide-field surface plasmon, leakage radiation, and total internal reflection fluorescence microscopy methods is presented.