High Contrast, Femtosecond Light Polarization Manipulation in Epsilon-near-Zero Material Coupled to a Plasmonic Nanoantenna Array
Journal
ACS Photonics
Journal Volume
8
Journal Issue
9
Pages
2791-2799
Date Issued
2021
Author(s)
Abstract
Ultrafast manipulation of light polarization is crucial in many nonlinear optic and optoelectronic operations. However, most of the configurations are suffering from low modulation speed (gigahertz) or small contrast ratio. Here, by taking advantange of the anisotropic nonlinear response of indium tin oxide at its epsilon-near-zero region and plasmonic nanoantennas at their polarization-sensitive resonance, we achieve a large, ultrafast anisotropic modulation of light. A polarization elliptic rotation of 32.5° at 1.23 μm wavelength, and a phase delay between the oscillations of the linear polarization axes of π/7 within 600 fs response time is demonstrated. This approach constitutes a novel, efficient way to implement all-optical high-speed polarization modulators and retarders. © 2021 American Chemical Society
Subjects
anisotropic nonlinearity; epsilon-near-zero material; femtosecond optical modulation; plasmonic nanoantenna array; polarization manipulation
SDGs
Other Subjects
Light modulation; Light polarization; Nanoantennas; Optical signal processing; Plasmonics; Tin oxides; Anisotropic nonlinearity; Epsilon-near zeros; Epsilon-near-zero material; Femtosecond optical modulation; Femtoseconds; High contrast; Nanoantenna arrays; Plasmonic nanoantenna; Plasmonic nanoantenna array; Polarization manipulation; Anisotropy
Type
journal article