Tailoring the plasmonic Fano resonance in metallic photonic crystals

Bauer, Carl J.; Gießen, Harald

doi:10.1515/nanoph-2019-0335

Cited by 15 publications

(6 citation statements)

References 47 publications

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“…On a separate note, introducing a spacer layer between the metallic grating and the underlying ITO waveguide layer may appear beneficial for controlling the coupling strength between the plasmonic and photonic resonances where coupling strengths can be directly correlated to the calculated electric field at the resonances. [ 303 ] By varying the spacer layer thickness, thus, one can design highly sensitive plasmonic sensors with narrow spectral features. Other concepts include considering a spacer array between the metallic array and the waveguide layer and embedding the metallic array within the waveguide.…”

Section: Sensing Performance Overview For Hybridized Plasmonic Sensorsmentioning

confidence: 99%

Engineering Plasmonic Hybridization toward Advanced Optical Sensors

Sarkar,

König

2023

Advanced Sensor Research

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The requirements for an optical sensor are high: the sensor should be reliable, quick, and simple, and all these features must be provided at ultralow fabrication costs. The requirements go even further, as the sensor may operate without an energy source, and nowadays, the sensor components should be recyclable. Today existing plasmonic concepts and advances in nanofabrication can meet these requirements. This review article describes the available nanoscale components and discusses their reasonable layout to obtain the sensing requirements. It is shown that combining photonic and plasmonic properties helps to get high sensitivity at low losses, where these hybrid modes with simple optical concepts are introduced. The current state of the art in developing lithographic nanostructuring and directed self‐assembly to pave the way for future refractive index sensors is also used. By providing a guideline for advanced sensors, how the individual optical components can be used to create hybrid properties that can be realized cost‐effectively are shown. The review article ends with a discussion on the perspectivs for plasmonic hybridization sensors.

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Section: Sensing Performance Overview For Hybridized Plasmonic Sensorsmentioning

confidence: 99%

Engineering Plasmonic Hybridization toward Advanced Optical Sensors

Sarkar,

König

2023

Advanced Sensor Research

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“…Metallic photonic crystal slabs that arrange periodic metallic nanostructures onto a hundred nanometer thick dielectric layer also allow the strong photon–plasmon coupling to produce waveguide–plasmon polaritons. − The waveguide mode (photon) propagating inside the slab can strongly interact with the collective electron oscillation (plasmons) in the metallic units through their overlapping electromagnetic field around the nanostructure . Consequently, two hybrid states of the waveguide–plasmon polaritons are generated and exhibit anticrossing behavior with large Rabi splitting. − The strong photon–plasmon interaction in metallic photonic crystal slabs opens up new possibilities for effectively tailoring the optical effects, including third-harmonic generation, magneto-optical Kerr effect, photoinduced electron transfer, etc.…”

Section: Introductionmentioning

confidence: 99%

Strong Photon–Plasmon Coupling for High-Order Waveguide–Plasmon Polaritons

et al. 2023

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Strong light−matter interaction enables significant modification of fundamental properties of coupled matter, such as chemical reaction rate, conductivity, and energy transfer, which is crucial for designing efficient light-emitting devices and lowthreshold lasing. Strong photon−plasmon coupling in metallic photonic crystal slabs has been extensively exploited for band gap engineering, third-harmonic generation, and enhanced Faraday rotation. However, current research focuses on coupling the waveguide mode to the dipolar plasmon that is inherently lossy and has a small quality factor. This paper reports a metallic photonic crystal slab constructed by placing split nanoring dimer arrays onto an indium−tin−oxide (ITO) waveguide to excite dipolar and highorder waveguide−plasmon polaritons with large Rabi splitting. The dimer unit comprises two identical split nanorings and supports dipolar and high-order hybrid plasmons derived from structural symmetry breaking and plasmon hybridization. Arrangement of the dimer into arrays on the ITO slab creates a strong coupling channel for the hybrid plasmons and the waveguide mode to generate dipolar and high-order waveguide−plasmon polaritons with distinct anticrossing dispersions. The strong coupling effect remarkably modifies the plasmon oscillations by altering the directions and strength of their dipole moment. We used the strongly coupled plasmons with narrow spectral line shapes as a refractive index sensor and obtained the largest sensitivity of 250 nm•RIU −1 and a figure of merit of 11.62 RIU −1 .

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“…This is realizable through enhancement of the intensity of their electromagnetic plasmon fields at the desired wavelengths. Two typical methods have been proposed to improve the strength of these plasmon fields: 1) optimization of the structural parameters and materials [1][2][3][4][5][6][7][8][9], 2) assembly of the plasmonic nanoparticles in order to create strong coupling interactions between the plasmon fields of neighboring nanoparticles through hybridization [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…An ultra-narrow-band perfect absorber in the near infrared region based on Fano resonances in a MIM meta-material composed of asymmetry double elliptic cylindershas been investigated by Yu et al [14]. Giessen et al showed that coupling strength of plasmon Fano resonances in a metallic photonic crystal can be controlled by varying the thickness of a spacer layer between the gold grating and the waveguide layer [12]. A wide bandwidth plasmonic meta-material absorber containing a broken cross as an elementary cell along with four rectangular loads has been proposed to improve the absorbance and achieve a tunable Fano response [13].…”

Section: Introductionmentioning

confidence: 99%

Demonstration of Tunable Fano Resonances In A Meta-Material Absorber Composed of Asymmetric Double Bars With Bent Arms

Mashkour

Koochaki

Ziabari

et al. 2021

Preprint

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In this paper a Metal-Insulator-Metal (MIM) plasmonic absorber consisting of asymmetric double bars with bent arms located on top of a silica layer coated on a metal film is proposed, and its resonant features are analyzed. The suggested structure supports both Fano and dipole perfect absorption resonances at the Near-Infrared Region (NIR). The asymmetry introduced into the structure can be induced by changing the bending angle or rotation angle of one of the antennas while the other one remains fixed. Simulation results demonstrate that by applying both asymmetry factors to the structure, one can have two individual Fano peaks at the same time. It is shown that the magnitude, central wavelength and line-width of the Fano peaks are adjustable by controlling the geometrical parameters of the structure. It is also indicated that, the quality factor (Q-factor) of the Fano resonance is inversely related to the degree of asymmetry introduced into the structure. According to the simulations, an ultra-narrow resonance peak with a bandwidth of 1.87 nm at the wavelength of 710 nm (corresponding to a Q-factor of 387) can be obtained by controlling the geometrical parameters. It is also discussed that, the absorptivity of Fano and the dipole peaks can be adjusted inversely, by manipulating the grapheme chemical potential. The ratio of the absorptivity to the chemical potential of graphene about-275 %/eV and 226 %/eV is calculated for the Fano peak and dipole peak, respectively. Accordingly, the presented structure is an adjustable NIR absorber with a fully tunable absorption spectrum which can be utilized in various applications from tunable reflectors and photo-detectors to ultra-narrowband and broadband optical modulators.

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Tailoring the plasmonic Fano resonance in metallic photonic crystals

Cited by 15 publications

References 47 publications

Engineering Plasmonic Hybridization toward Advanced Optical Sensors

Engineering Plasmonic Hybridization toward Advanced Optical Sensors

Strong Photon–Plasmon Coupling for High-Order Waveguide–Plasmon Polaritons

Demonstration of Tunable Fano Resonances In A Meta-Material Absorber Composed of Asymmetric Double Bars With Bent Arms

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