Whispering-gallery mode resonance-assisted plasmonic sensing and switching in subwavelength nanostructures

Luo, Youlin; Luo, Xingqi; Yi, Jiang Tao; Ou, Jie; Zhu, Weihua; Chen, Zhiyong; Liu, W. M.; Wang, Xinlin

doi:10.1007/s10853-020-05581-8

Cited by 8 publications

(2 citation statements)

References 66 publications

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“…[ 1 , 2 ] However, up to now, all metamaterials (e.g.,EM metamaterials, [ 3 , 4 ] optical metamaterials, [ 5 , 6 ] mechanical metamaterials and other metamaterials with unnatural properties) still rely on the collection of artificially designed microstructure units. [ 7 , 8 , 9 , 10 ] Taking EM metamaterials as an example, [ 11 , 12 ] the EM metamaterials can produce fascinating physical properties unavailable in naturally when permittivity and permeability of the material are simultaneously negative. [ 13 , 14 , 15 , 16 , 17 , 18 ] These fascinating properties can allow metamaterials to be widely used in various fields such as wireless communication, [ 19 , 20 ] radar stealth, [ 21 , 22 ] and thermal energy conversion.…”

Section: Introductionmentioning

confidence: 99%

Molecularly Resonant Metamaterials for Broad‐Band Electromagnetic Stealth

et al. 2023

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Electromagnetic (EM) metamaterial is a composite material with EM stealth properties, which is constructed by artificially reverse engineering metal split resonance rings (SRR). However, the greatest limitation of EM metamaterials is that they can only stealth at a fixed and lower frequency of EM waves, and modern processing techniques still cannot meet the accuracy requirements to fabric nano‐size structural unit. Nano‐sized and even ultra‐small SRR at molecular level are promising arrays to realize the ability of EM stealth function at a higher frequency, although it has proven challenging to synthesize long, straight, connected molecular SRR, and also difficult to arrange those molecular SRR into a strict array. Here, the study overcomes this challenge and demonstrates that the fabric of polypyrrole molecular SRR achieves an ultra‐small inner diameter of 2.49 Å and realizes the arrays arrangement at molecular level. Furthermore, the study exploits the EM stealth function and verifies that such arrays of molecular SRR with 2.49 Å have the ability to reach high‐performance EM stealth in the range of 106–1016 Hz. This design concept opens a pathway for developing new metamaterials with broadband EM wave stealth and also serves the wider range of new applications.

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Section: Introductionmentioning

confidence: 99%

Molecularly Resonant Metamaterials for Broad‐Band Electromagnetic Stealth

et al. 2023

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“…high sensitivity by increasing the interaction between light and biomolecules in nanostructures, including surface plasmonic resonances [3], Fano-resonance [4], and whispering-gallery modes (WGMs) [5]. The WGM resonance originates from the total internal reflection by the rim of a rotationally invariant resonator.…”

Section: Introductionmentioning

confidence: 99%

Nanoscale acoustic waves detection enhanced by edge plasmon mode resonance in nanoapertures

Wang¹,

Ji²,

Wu³

et al. 2022

J. Opt.

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Nanoapertures in metal films confine light to subwavelength dimensions generating enhanced electromagnetic fields. Acoustic resonances of nanostructures can be directly excited by dual frequency lasers due to intensity beating and induce the change of the refractive index in nanoaperture. Here we present that nanoapertures consisting of two intersecting holes support edge plasmons in the form of whispering-gallery modes which are highly sensitive to the refractive index of the surrounding environment. The refractive index variation caused by acoustic resonances in the nanostructure results in a significant change of transmission through the nanoaperture. Experimental results indicate that edge plasmons in the cavity of double nanohole help to minimize radiative losses via stronger confinement and increase acoustic detecting sensitivity. The edge plasmon modes in nanostructures may find applications in nanoparticle trapping, biosensors and light matter interactions in nanofluidics.

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