Plasmonic-Induced Transparencies in an Integrated Metaphotonic System

Abstract

In this contribution, we numerically demonstrate the generation of plasmonic transparency windows in the transmission spectrum of an integrated metaphotonic device. The hybrid photonic–plasmonic structure consists of two rectangular-shaped gold nanoparticles fully embedded in the core of a multimode dielectric optical waveguide, with their major axis aligned to the electric field lines of transverse electric guided modes. We show that these transparencies arise from different phenomena depending on the symmetry of the guided modes. For the TE0 mode, the quadrupolar and dipolar plasmonic resonances of the nanoparticles are weakly coupled, and the transparency window is due to the plasmonic analogue of electromagnetically induced transparency. For the TE1 mode, the quadrupolar and dipolar resonances of the nanoparticles are strongly coupled, and the transparency is originated from the classical analogue of the Autler–Townes effect. This analysis contributes to the understanding of plasmonic transparency windows, opening new perspectives in the design of on-chip devices for optical communications, sensing, and signal filtering applications.

Integrated Optical Filters with Hyperbolic Metamaterials

“…For this purpose, we propagated the fundamental and photonic modes through the waveguide. For the mode, the electric field is mainly oriented along the horizontal x direction, while for , the electric field is oriented along the vertical y direction [ 20 ]. For these simulations, we considered a system of layers (4 Au layers and 4 layers) with a filling fraction ( nm, nm, period nm), on top of the dielectric waveguide.…”

“…With the development of nanotechnology, new opportunities have opened up for the integration of artificially engineered subwavelength materials with enhanced properties not otherwise found in nature, so-called metamaterials [ 8 , 9 , 10 ], with photonic waveguides. Among the different structures integrated to waveguides for signal filtering that can be mentioned are dielectric and plasmonic ring resonators [ 11 , 12 ], gratings [ 13 , 14 , 15 ], nanodisk [ 16 , 17 , 18 ] and asymmetric resonators [ 19 , 20 ], nanostructured plasmonic waveguides [ 21 , 22 ], waveguide cladding modulators [ 23 , 24 , 25 , 26 ], and photonic crystals [ 27 , 28 ]. In a previous work, we experimentally demonstrated that a gold nanoslab placed on top of an ion-exchanged glass waveguide serves as a stop-band filter of light for a broad bandwidth at near infrared wavelengths [ 29 ].…”

Design of Plasmonic Yagi–Uda Nanoantennas for Chip-Scale Optical Wireless Communications

“…Plasmonic nanoantennas, i.e., high-frequency analogs of Radio Frequency (RF) antennas, can be tailored to operate in the terahertz [ 1 , 2 , 3 ], infrared [ 4 ], and visible frequencies [ 5 ] for a plethora of applications, including directive radiation [ 6 ], gas sensing [ 7 ], biosensing [ 8 ], chemosensing [ 9 ], photovoltaics [ 10 ], electromagnetically induced transparency [ 11 ], and optical microscopy [ 12 ], among others. In particular, the high-frequency operation of plasmonic nanoantennas promises seamless integration of the future sixth generation of mobile communications networks (6G) into existing fiber-optic infrastructures, crucially important to avoid communication bottlenecks.…”