Conceptual Implementation of a Photonic–Plasmonic Transistor onto a Structured Nano‐Guided Hybrid System

Lio, Giuseppe Emanuele; Madrigal, Josslyn Beltran; Couteau, Christophe; Blaize, Sylvain; Caputo, Roberto

doi:10.1002/pssa.201900911

Cited by 4 publications

(2 citation statements)

References 59 publications

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“…Thus, the tuning of central position of PSB (PSB λ ) occurs by the change of thickness of the layers (d H , d L ), their relative refractive index values (n H , n L ), and the number of bilayers [9]. Photonic crystals are fabricated through plenty of methods [10][11][12][13] and among them, the electrochemical process stands out as an excellent way for the cost-effective and precise fabrication of porous PCs [5]. The low cost of production arises from the nanoscale-ranged control of the interpore distance and length of the pores by the fully programmable change of anodization conditions.…”

Section: Introductionmentioning

confidence: 99%

Structural stability and optical properties of 1D photonic crystals based on porous anodic alumina after annealing at different temperatures

et al. 2022

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Porous anodic alumina photonic crystals with a photonic stop-band placed in the mid-infrared spectral region represent a promising approach for increasing of gas sensors sensitivity. An onion-like layered distribution of anionic impurities is a hallmark of porous anodic alumina, and its presence is generally considered to demarcate the boundary between transparent and opaque ranges in the infrared spectral region. Here, we study the effect of annealing in the temperature range of 450–1 100 °C on the structural stability and optical properties in photonic crystals based on porous anodic alumina fabricated by pulse anodization in oxalic acid. Pulse sequences were selected in a way to obtain photonic crystals of different periodic structures with a photonic stop-band located in visible and mid-infrared spectral regions. The first photonic crystal was composed of layers with gradually changing porosity, whereas the second photonic crystal consisted of a sequentially repeated double-layer unit with an abrupt change in porosity. We investigated the response of alumina with rationally designed porosities and different arrangements of porous layers for high-temperature treatment. The microstructure (scanning electron microscopy), phase composition (x-ray diffraction), and optical properties (optical spectroscopy)were analysed to track possible changes after annealing. Both photonic crystals demonstrated an excellent structural stability after 24 hour annealing up to 950 °C. At the same time, the evaporation of the anionic impurities from porous anodic alumina walls caused a shift of the photonic stop-band towards the shorter wavelengths. Furthermore, the annealing at 1 100 °C induced a high transparency (up to 90%) of alumina in mid-infrared spectral region. It was shown thus that properly selected electrochemical and annealing conditions enable the fabrication of porous photonic crystals with the high transparency spanning the spectral range up to around 10 µm.

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Section: Introductionmentioning

confidence: 99%

Structural stability and optical properties of 1D photonic crystals based on porous anodic alumina after annealing at different temperatures

et al. 2022

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“…Nowadays, these kinds of techniques are used for the detection of pollutants, proteins, DNA, and biologically relevant nanoparticles [24][25][26]. The optical properties of metal nanoantennas are also used in lasing applications [27] and in telecommunications [28,29]. Lattice plasmon resonance (LPM) has been also coupled to effects of mechanical stretching in order to implement surface mechanical sensors [15,30,31] or to improve and simultaneously tune the optical and thermal response of a given physical system [32].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Lattice Plasmon Modes in 2D Arrays of Au Nanoantennas

et al. 2022

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The coupling of gold nanoantennas (AuNAs) in the arrangement of monomers in bidimensional gratings is investigated both experimentally and numerically. The influence of edge diffraction, corresponding to the grazing propagation of specific diffracted orders, and the dependence of grating parameters on lattice plasmon modes are studied. It is shown that the grating pitch influences the spectral position of the Rayleigh wavelength related to the grazing diffraction in air and/or in glass. In order to investigate the effect of diffraction and its interplay with the Rayleigh wavelength, extinction measurements with different incidence angles are carried out. For incidence angles above θ=20∘, along with the excitation of quadrupolar and vertical modes, very narrow dips or sharp excitations are observed in the spectra. These ones strongly depend on the respective spectral position of Rayleigh anomaly and specific dipolar mode, on the propagation direction of the grazing diffraction, and on the considered plasmon mode. These features are explained in the light of numerical calculations obtained with Green’s tensor method. All the above different characteristics and couplings are of great practical interest, especially for a possible implementation in biosensor devices and for other technological applications spanning from precision medicine and life science to telecommunications and energy systems.

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Hybrid Photonic–Plasmonic Metastructures

Lio

Caputo

2021

Hybrid Flatland Metastructures

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This chapter considers hybrid metastructures operating in waveguide configuration. This configuration can unlock unprecedented functionalities when the interplay between quantum emitters and plasmonic nanostructures is efficiently exploited. The chapter begins with an introduction of the Purcell effect responsible for the emission enhancement of fluorescent subentities when located in nanocavities. Introductory paragraphs also explain the basic mechanisms of the plasmon–exciton exchange. The design of a hybrid system follows including plasmonic nanotapers (NTs) with quantum dots (QDs) positioned in proximity to their apices. The various phases of the fabrication procedure of the designed metastructure, involving a mixed top-down and bottom-up nanofabrication approach, are accurately illustrated. A fluorescent spectroscopy characterization of the prototype evidences a sensitive Purcell enhancement of the emission of the quantum dots located in proximity of the NTs. Finally, a numerical study of this hybrid system is reported that demonstrates how the light enhancement can be controlled to efficiently route and modulate high-frequency optical signals in a photonic–plasmonic transistor effect.

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Conceptual Implementation of a Photonic–Plasmonic Transistor onto a Structured Nano‐Guided Hybrid System

Cited by 4 publications

References 59 publications

Structural stability and optical properties of 1D photonic crystals based on porous anodic alumina after annealing at different temperatures

Structural stability and optical properties of 1D photonic crystals based on porous anodic alumina after annealing at different temperatures

Investigation of Lattice Plasmon Modes in 2D Arrays of Au Nanoantennas

Hybrid Photonic–Plasmonic Metastructures

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