2020
DOI: 10.3390/app10072603
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Tunable Fano Resonances in an Ultra-Small Gap

Abstract: A Fano resonance is experimentally observed in a single silver nanocube separated from a supporting silver film by a thin aluminum oxide film. The resonance spectrum is modulated by changing the size of the silver nanocube and its distance from the silver film. The system is fabricated by a bottom-up process with an accurately controlled nanogap at the sub-6-nm scale. The simulation result shows that the destructive interference between the dipole mode and the quadrupole mode in this “nanocube on mirror” (NCoM… Show more

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Cited by 6 publications
(4 citation statements)
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“…In addition, ln(1/ R )/ L represents the mirror loss of the resonator. This equation considers the uniform non-absorption condition only and ignores the internal absorption and scattering losses of the nanowire [ 46 , 47 , 48 , 49 ]. Here, R is the end face reflectivity, which is defined as: …”
Section: Symmetrical Ag-graphene-sio 2 Nanostructured Laser Based On the Characteristic Analysismentioning
confidence: 99%
“…In addition, ln(1/ R )/ L represents the mirror loss of the resonator. This equation considers the uniform non-absorption condition only and ignores the internal absorption and scattering losses of the nanowire [ 46 , 47 , 48 , 49 ]. Here, R is the end face reflectivity, which is defined as: …”
Section: Symmetrical Ag-graphene-sio 2 Nanostructured Laser Based On the Characteristic Analysismentioning
confidence: 99%
“…Recently, Fano resonance were located in an individual silver nanocube isolated with a thin aluminum oxide from the supporting thin silver film. These structure were grown using a bottom-up method with controlled nanogap [9]. Many aspects of coupled plasmonic structures have been studied so far.…”
Section: Introductionmentioning
confidence: 99%
“…Meta-molecules composed of different types of meta-atoms are fundamental elements that control the transmission, reflection, and absorption of light and realize the tunability of resonance wavelength at the THz frequencies. Various electromagnetically induced transparency (EIT)-analog optical systems based on THz metamaterials exhibit a narrow transmission or reflection spectral band and plasmon-induced transparency behavior [21][22][23][24]. The EIT-like effects of bright-bright mode coupling, which occur when two resonances of two different types of meta-atoms are excited in close proximity in the spectral domain, inevitably lead to resonance frequency detuning based on Fano-type interference with ultrahigh quality factor (Q-factor) [25][26][27].…”
Section: Introductionmentioning
confidence: 99%