Tunable Multipolar Fano Resonances and Electric Field Enhancements in Au Ring-Disk Plasmonic Nanostructures

Qiu, Rong; Lin, Hang; Huang, Jing; Liang, Cuiping; Yi, Zao

doi:10.3390/ma11091576

Cited by 9 publications

(4 citation statements)

References 48 publications

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“…In order to overcome these shortcomings and obtain good sensing performance, fiber ring laser has been widely studied in recent years. Various types of Interferometer Fiber structures are embedded in the FRL to form a sensing system to measure biomolecules [14], magnetic field [15], electric field [16], stress [17], curvature [8], and environmental humidity [18]. In the sensing system, the interferometer plays a role of filtering, and its passband is affected by the exotic environment.…”

Section: Introductionmentioning

confidence: 99%

In-Fiber Mach–Zehnder Interferometer Based on Er Doped Up-Taper and Peanut-Shaped Fiber Structure in Fiber Ring Laser

Lin¹,

Zhou

Shao

et al. 2021

IEEE Access

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It is demonstrated that in this paper a peanut shaped structure cascaded with up-taper fiber structure can realize the inter mode interference between the Erbium doped fiber (EDF) core mode and cladding modes in fiber ring laser (FRL). A simple and inexpensive Mach-Zehnder interferometer (MZI) based on this structure is proposed. Shown from experimental results, the optical intensity of the core mode can be coupled into the cladding modes in the first peanut-shaped structure. Then, the light in the cladding modes can be recoupled into the core mode in the up-taper structure. A high-quality interference spectrum with a signal to noise ratio about 50 dB was observed. Besides, the structure exhibits good mechanical stability when compared to MZIs based on taper or offset structure. The temperature sensitivity of the FRL sensor is 301 pm/℃ and the RI sensitivity is 156 nm/RIU. This kind of MZI will have potential applications in remote sensing technique and the development of life and health.

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Section: Introductionmentioning

confidence: 99%

In-Fiber Mach–Zehnder Interferometer Based on Er Doped Up-Taper and Peanut-Shaped Fiber Structure in Fiber Ring Laser

Lin¹,

Zhou

Shao

et al. 2021

IEEE Access

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“…Various types of the plasmonic configurations have been used for strong coupling such as metal films, [ 45 ] nanoparticles (NPs), [ 46 ] nanorings, [ 47 ] nanorods, [ 48,49 ] nanoprism, [ 50 ] nanovoid, [ 51 ] nanowire, [ 52,53 ] dimmers, [ 54 ] nanodisk, [ 18,55 ] core–shell, [ 56 ] nanoantennas, [ 57 ] nanosphere, [ 58 ] nanostars, [ 59 ] and so on.…”

Section: Introductionmentioning

confidence: 99%

Strong Exciton–Plasmon Coupling in Waveguide‐Based Plexcitonic Nanostructures

Mahinroosta

Hamidi

2020

Physica Status Solidi (b)

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A new 2D plexcitonic structure based on coupled‐resonator optical waveguides is demonstrated to enhance light–matter interactions in the J‐aggregate molecules coupled to the plasmonic resonator. For this purpose, four different plexcitonic structures are defined by adjusting the coverage of dye medium over the plasmonic structures and applying forward or backward illumination direction, which are examined by the finite difference time domain method. The results show that several parameters could be used to sweep plasmon–exciton coupling in the weak, intermediate, and strong coupling regimes such as the type of structures (single or array of nanodisks), the radius of nanodisks, the direction of the incident light, and the concentration of J‐aggregate molecules. From the presented results, there are remarkable values for Rabi splitting by tuning these parameters, and it is achieved that the sample with coverage of dye in the style of the plasmonic pattern in backward illumination offers higher strength of the plasmon–exciton coupling, and then Rabi splitting is about 670 meV for the radius set to 90 nm. This amount of splitting in this new kind of plexcitonic structure can open new insight in low cost and efficient hybrid structures.

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“…Generally, according to the magnitude of net dipole moment [8], surface plasmon resonance can be divided into bright mode [9][10][11] and dark mode [12]. Under the excitation of an external field, the mode which can be excited directly and has a larger dipole moment is called the bright mode.…”

Section: Introductionmentioning

confidence: 99%

Generation of multiple Fano resonances in plasmonic panda’s eye structures

Guo¹,

Huo²,

Jiang³

et al. 2020

Phys. Scr.

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A kind of dimer nanostructure similar to panda’s eye (P-E), consisting two center biased elliptical rings, is proposed in this paper. The finite element method is used to study the nanostructure with the vertical incident light. The structure exhibits high order magnetic modes and the magnetic modes intensity can be manipulated independently by changing the structure parameters. The intensities of the magnetic dipole and magnetic quadrupole modes can be controlled by changing the angle between two rings and the distance of two cavity centers, respectively. Moreover, when two circular cavities increase simultaneously, the intensity of the magnetic octupole mode increases accordingly. Fano resonance can be induced when the electric mode couples with the magnetic mode. When the radius of the left circular cavity decreases, triple Fano resonance is formed. And when the whole structure is rotated, quintuple Fano resonance can be formed. More interesting, when the radii of the circular cavities of the two elliptical rings increase to 50 and 55 nm, the nanostructure becomes crescent dimer, and the enhancements of magnetic field and electric field reach 38 and 390, respectively. The P-E structure has potential application value in multiwavelength surface enhanced spectroscopy and biochemical sensing.

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Tunable Multipolar Fano Resonances and Electric Field Enhancements in Au Ring-Disk Plasmonic Nanostructures

Cited by 9 publications

References 48 publications

In-Fiber Mach–Zehnder Interferometer Based on Er Doped Up-Taper and Peanut-Shaped Fiber Structure in Fiber Ring Laser

In-Fiber Mach–Zehnder Interferometer Based on Er Doped Up-Taper and Peanut-Shaped Fiber Structure in Fiber Ring Laser

Strong Exciton–Plasmon Coupling in Waveguide‐Based Plexcitonic Nanostructures

Generation of multiple Fano resonances in plasmonic panda’s eye structures

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