High figure of merit cylinder‐shaped negative refractive index metamaterial based on paper as dielectric material

We demonstrate the realization of plasmon induced transparency (PIT) in a nanostructure composed of silver nanobars and a silver nanodisk. The optical properties of the planar metamaterials have been investigated theoretically in the paper. The classical coupled harmonic oscillator model demonstrates the PIT phenomenon in a nanodisk–nanobar system. Additionally, double PIT response is observed when two nanobars are located in proximity to the silver nanodisk. The PIT window wavelength and bandwidths can be efficiently tuned by controlling the geometric parameters such as the lengths of nanobars and the coupling distances between the nanodisk and nanobars. Moreover, the transparency window shows highly sensitive response to the refractive index of the environmental medium. A high figure of merit up to 15.5 of the asymmetrical system for refractive index sensing is achieved. The tunability of the PIT may have potential application on slow light and highly integrated optical circuits.

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Nanoslotted microring resonator for high figure of merit refractive index sensing

Optica Applicata ◽

10.37190/oa200103 ◽

2020 ◽

Vol 50 (1) ◽

Author(s):

Daquan Yang ◽

Bing Duan ◽

Xuan Zhang ◽

Hui Lu

Keyword(s):

Refractive Index ◽

Figure Of Merit ◽

Fdtd Method ◽

Three Dimensional ◽

Microring Resonator ◽

Strong Light ◽

Refractive Index Sensing ◽

Biochemical Sensing ◽

Light Matter Interaction ◽

High Figure

A nanoslotted microring resonator (NSMR) with enhanced light-matter interaction has been designed, which can be used for high sensitive refractive index sensing. The performance of the device is investigated theoretically based on a three-dimensional finite-difference time-domain (3D-FDTD) method. In order to achieve high figure of merit sensing, the nanoslot geometry is exploited to make the optical field strongly localized inside the low index region and overlap sufficiently with the analytes. By using the 3D-FDTD method, the proposed NSMR sensor device achieves a high Q-factor (Q > 105) and sensitivity ~100 nm/RIU (RIU – refractive index unit). Moreover, the strong light confinement introduced by the nanoslot in NSMR results in the sensor figure of merit as high as 6.73 × 103. Thus, the design we proposed is a promising platform for refractive index-based biochemical sensing and lab-on-a-chip applications.

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Photonic crystal nanoslotted parallel quadrabeam integrated cavity for refractive index sensing with high figure of merit

Photonics and Nanostructures - Fundamentals and Applications ◽

10.1016/j.photonics.2015.01.008 ◽

2015 ◽

Vol 15 ◽

pp. 124-129 ◽

Cited By ~ 3

Author(s):

Daquan Yang ◽

Huiping Tian ◽

Yuefeng Ji

Keyword(s):

Refractive Index ◽

Photonic Crystal ◽

Figure Of Merit ◽

Refractive Index Sensing ◽

High Figure

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Tunable mid-infrared refractive index sensor with high angular sensitivity and ultra-high figure-of-merit based on Dirac semimetal

Results in Physics ◽

10.1016/j.rinp.2020.103035 ◽

2020 ◽

Vol 17 ◽

pp. 103035

Author(s):

Yunyang Ye ◽

Minzhu Xie ◽

Jianxing Ouyang ◽

Jiao Tang

Keyword(s):

Refractive Index ◽

Figure Of Merit ◽

Refractive Index Sensor ◽

Angular Sensitivity ◽

Mid Infrared ◽

Dirac Semimetal ◽

High Figure

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Plasmonic Refractive Index Sensor with High Figure of Merit Based on Concentric-Rings Resonator

10.20944/preprints201711.0088.v2 ◽

2017 ◽

Author(s):

Zhaojian Zhang ◽

Junbo Yang ◽

Xin He ◽

Jingjing Zhang ◽

Jie Huang ◽

...

Keyword(s):

Refractive Index ◽

Figure Of Merit ◽

Near Infrared ◽

Optical Resolution ◽

Infrared Region ◽

Refractive Index Sensor ◽

Plasmonic Sensor ◽

Special Cases ◽

Metal Insulator Metal ◽

High Figure

A plasmonic refractive index (RI) sensor based on metal-insulator-metal (MIM) waveguide coupled with concentric double rings resonator (CDRR) is proposed and investigated numerically. Utilizing the novel supermodes of the CDRR, the FWHM of the resonant wavelength can be modulated, and a sensitivity of 1060 nm/RIU with high figure of merit (FOM) 203.8 is realized in the near-infrared region. The unordinary modes as well as the influence of structure parameters on the sensing performance are also discussed. Such plasmonic sensor with simple framework and high optical resolution could be applied to on-chip sensing systems and integrated optical circuits. Besides, the special cases of bio- sensing and triple rings are also discussed.

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The transverse electric plasmonic modes in a negative refractive index black phosphorene waveguide structure

Journal of Physics D Applied Physics ◽

10.1088/1361-6463/ac357e ◽

2021 ◽

Author(s):

Cuihong Yang ◽

J. Y. Zhang ◽

R. Wieser ◽

Wen Xu

Keyword(s):

Refractive Index ◽

Chemical Potential ◽

Transverse Electric ◽

Dielectric Material ◽

Negative Refractive Index ◽

Practical Method ◽

Existence Condition ◽

Waveguide Structure ◽

Symmetric Mode ◽

Black Phosphorene

Abstract We consider the transverse electric (TE) plasmonic modes supported by black phosphorene (BP) in a parallel waveguide structure with left-handed material (LHM) instead of the conventional right-handed dielectric material. The existence condition of the TE BP surface plasmon polariton (SPP) is $\mathrm{Im}\sigma>0$. When an electric field is polarized along one of the two orthogonal crystal axes, the anisotropic symmetric and anti-symmetric plasmonic modes depend on the incident optical energy, the chemical potential, and the distance between two BP sheets can be observed. The symmetric mode has a more extensive effective refractive index, which possesses stronger field confinement. With a decreasing distance $d$ between two BP sheets, the coupling strength between the two separate BPSPP waves increases. When $d$ is small enough, the anti-symmetric mode root does not exist. LHMs can be used to realize a TE BPSPP mode to enhance the localization of the BPSPP, which is a practical method in optoelectronic devices based on black phosphorene.

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