Optimized grating as an ultra-narrow band absorber or plasmonic sensor

Meng, Lijun; Zhao, Ding; Ruan, Zhichao; Li, Qiang; Yang, Yuanqing; Qiu, Min

doi:10.1364/ol.39.001137

Cited by 165 publications

(70 citation statements)

References 32 publications

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“…7(d~f)), which demonstrate that the gain-assisted sensor has a higher sensitivity in a larger detecting range. The characterized wavelength in our work mainly focuses on the visible region, which is compatible with current data of the plasmon sensor [38,39]. And these different responses at different resonance peaks will enhance the selectivity and the sensitivity of the sensors for the real sensing applications.…”

Section: Gain-assisted Nanoslit Array For Sensing Applicationssupporting

confidence: 54%

High-efficiency refractive index sensor based on the metallic nanoslit arrays with gain-assisted materials

Luo

Tao

et al. 2016

Nanophotonics

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Abstract:We have designed and investigated a three-band refractive index (RI) sensor in the range of 550-900 nm based on the metal nanoslit array with gain-assisted materials. The underlying mechanism of the three-band and enhanced characteristics of the metal nanoslit array with gain-assisted materials, have also been investigated theoretically and numerically. Three resonant peaks in transmission spectra are deemed to be in different plasmonic resonant modes in the metal nanoslit array, which leads to different responses for the plasmonic sensor. By embedding the structure into the CYTOP with proper gain-assisted materials, the sensing performances can be greatly enhanced due to a dramatic amplification of the extraordinary optical transmission (EOT) resonance by the gain medium. When the gain values reach their corresponding thresholds for the three plasmonic modes, the ultrahigh sensitivities in three bands can be obtained, and especially for the second resonant wavelength (λ 2 ), the FOM=128.1 and FOM*= 39100 can be attained at the gain threshold of k =0.011. Due to these unique features, the designing scheme of the proposed gain-assisted nanoslit sensor could provide a powerful approach to optimize the

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Section: Gain-assisted Nanoslit Array For Sensing Applicationssupporting

confidence: 54%

High-efficiency refractive index sensor based on the metallic nanoslit arrays with gain-assisted materials

Luo

Tao

et al. 2016

Nanophotonics

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“…To realise ultra-narrow band absorption, some simpler structures with metallic materials can also be employed (Meng et al, 2014;Li et al, 2014). However, they can only be operated at a single wavelength, i.e.…”

Section: Figurementioning

confidence: 99%

Polarization-independent absorption enhancement in a graphene square array with a cascaded grating structure

2018

J Synchrotron Radiat

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The polarization-independent enhanced absorption effect of graphene in the near-infrared range is investigated. This is achieved by placing a graphene square array on top of a dielectric square array backed by a two-dimensional multilayer grating. Total optical absorption in graphene can be attributed to critical coupling, which is achieved through the combined effect of guided-mode resonance with the dielectric square array and the photonic band gap with the two-dimensional multilayer grating. To reveal the physical origin of such a phenomenon, the electromagnetic field distributions for both polarizations are illustrated. The designed graphene absorber exhibits near-unity polarization-independent absorption at resonance with an ultra-narrow spectrum. Moreover, the polarization-independent absorption can be tuned simply by changing the geometric parameters. The results may have promising potential for the design of graphene-based optoelectronic devices.

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“…In [61] rather than creating a waveguide or grating into a dielectric top layer, the grating was constructed directly onto the silver surface. This resulted in a simple absorber with a subnanometer bandwidth.…”

Section: Additional Gratingmentioning

confidence: 99%

“…The temporal coupled-mode theory [58][59][60][61][62] is used to provide light on the mechanism of the absorption. Under illumination of the resonant wavelength, surface plasmon polaritons will be excited.…”

Section: Additional Gratingmentioning

confidence: 99%

Metasurfaces-Based Absorption and Reflection Control: Perfect Absorbers and Reflectors

Badloe

Mun

Rho

2017

Journal of Nanomaterials

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In the past decade, the realisation of negative index materials has initiated extensive research into metamaterials. Perfect absorbers and reflectors are of particular interest as their usefulness is endless in a range of different fields and devices. Since it was originally shown that a device can achieve unity absorption of electromagnetic waves, it has become a hot area of research to develop perfect absorbers based on polarisation independence and incident angle independence, at a range of frequencies from microwave to optical ones. The amazing performance, flexibility, and tunability of these metamaterials will be discussed here, by presenting the different designs and working mechanisms that have been realised up to now. Their limitations and shortcomings will be addressed and future plans for perfect absorbers and reflectors will be suggested.

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Optimized grating as an ultra-narrow band absorber or plasmonic sensor

Cited by 165 publications

References 32 publications

High-efficiency refractive index sensor based on the metallic nanoslit arrays with gain-assisted materials

High-efficiency refractive index sensor based on the metallic nanoslit arrays with gain-assisted materials

Polarization-independent absorption enhancement in a graphene square array with a cascaded grating structure

Metasurfaces-Based Absorption and Reflection Control: Perfect Absorbers and Reflectors

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