Ultraslow long-living plasmons with electromagnetically induced transparency

Ziemkiewicz, David; Słowik, Karolina; Zielińska-Raczyńska, Sylwia

doi:10.1364/ol.43.000490

Cited by 14 publications

(7 citation statements)

References 29 publications

(50 reference statements)

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“…Moreover, liquids have sufficiently high thermal conductivities to allow superfast heat transfer from the molten layers to the surrounding environments so that the lifetime of the molten layers in liquids is much shorter than 1 ns 75 . The life time of an SPP typically ranges from sub-ps to several ps 76 depending on the materials and irradiation wavelength, and can be extended up to microseconds when using a thin film sandwiched by different media 77 . Assuming the life time is longer than several ns, SPP can survive until the complete solidification of molten layers.…”

Section: Orientation Manipulation Of Si-hsfl On Microgrooves By Changmentioning

confidence: 99%

Hierarchical microstructures with high spatial frequency laser induced periodic surface structures possessing different orientations created by femtosecond laser ablation of silicon in liquids

Zhang¹,

Sugioka²

2019

Opto-Electronic Advances

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High spatial frequency laser induced periodic surface structures (HSFLs) on silicon substrates are often developed on flat surfaces at low fluences near ablation threshold of 0.1 J/cm 2 , seldom on microstructures or microgrooves at relatively higher fluences above 1 J/cm 2. This work aims to enrich the variety of HSFLs-containing hierarchical microstructures, by femtosecond laser (pulse duration: 457 fs, wavelength: 1045 nm, and repetition rate: 100 kHz) in liquids (water and acetone) at laser fluence of 1.7 J/cm 2. The period of Si-HSFLs in the range of 110-200 nm is independent of the scanning speeds (0.1, 0.5, 1 and 2 mm/s), line intervals (5, 15 and 20 μm) of scanning lines and scanning directions (perpendicular or parallel to light polarization direction). It is interestingly found that besides normal HSFLs whose orientations are perpendicular to the direction of light polarization, both clockwise or anticlockwise randomly tilted HSFLs with a maximal deviation angle of 50° as compared to those of normal HSFLSs are found on the microstructures with height gradients. Raman spectra and SEM characterization jointly clarify that surface melting and nanocapillary waves play important roles in the formation of Si-HSFLs. The fact that no HSFLs are produced by laser ablation in air indicates that moderate melting facilitated with ultrafast liquid cooling is beneficial for the formation of HSFLs by LALs. On the basis of our findings and previous reports, a synergistic formation mechanism for HSFLs at high fluence was proposed and discussed, including thermal melting with the concomitance of ultrafast cooling in liquids, transformation of the molten layers into ripples and nanotips by surface plasmon polaritons (SPP) and second-harmonic generation (SHG), and modulation of Si-HSFLs direction by both nanocapillary waves and the localized electric field coming from the excited large Si particles.

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Section: Orientation Manipulation Of Si-hsfl On Microgrooves By Changmentioning

confidence: 99%

Hierarchical microstructures with high spatial frequency laser induced periodic surface structures possessing different orientations created by femtosecond laser ablation of silicon in liquids

Zhang¹,

Sugioka²

2019

Opto-Electronic Advances

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“…To calculate the reflection and scattering spectra, we have used the FDTD method, with medium parameters described in [24,26]. The simulation domain is a two-dimensional cross-section of the structure, as shown in Figure 1a.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…The metal film is deposited on a glass substrate with g = 2.25. To obtain the frequency of SPP modes, one has to consider the boundary conditions on the glass-metal and metal-air interfaces [22,26].…”

Section: Theorymentioning

confidence: 99%

Fractal Plasmons on Cantor Set Thin Film

Ziemkiewicz

Karpiński

Zielińska-Raczyńska

2019

Entropy

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The propagation of surface plasmon–polaritons is investigated in a metallic, fractal-like structure based on Cantor set. The dynamic of plasmonic modes generating on the Cantor structure is discussed in the context of the setup geometry. The numerically obtained reflection spectra are analyzed with the box-counting method to obtain their dimension, which is shown to be dependent on the geometry of the plasmonic structure. The entropy of the structure is also calculated and shown to be proportional to the dimension. Presented analysis allows for extracting information about fractal plasmonic structure from the reflectance spectrum. Predictions regarding the experimental observation of discussed effects are presented.

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“…Artificial atoms (called meta-atoms) or molecules (called meta-molecules), as the basic structural elements for constructing metamaterials, are designed and fabricated to implement a device with the desired characteristics and functionalities. In particular, the meta-molecules created by engineering spatial arrangement or interatomic geometry of different types of meta-atoms achieve high-level functionalities, such as plasmon-induced transparency, multifunctional filtering, invisibility cloaking, tunable multiple resonators, reflective-index engineering, and Fano resonance [5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Controllable Fano-like Resonance in Terahertz Planar Meta-Rotamers

Bae

Lee

2021

Applied Sciences

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Meta-molecules composed of meta-atoms exhibit various electromagnetic phenomena owing to the interaction among the resonance modes of the meta-atoms. In this study, we numerically investigated Fano-like-resonant planar metamaterials composed of meta-molecules at terahertz (THz) frequencies. We present meta-rotamers based only on the difference in the spatial position of their component meta-atoms (C- and Y-shapes) that can be interconverted by rotations and have tunable Fano-like resonance. This is because of the cooperative effects determined by the spatial coupling conditions of the nodes and antinodes of electric-dipole and inductive–capacitive (LC) resonances of the meta-atoms. The findings of this study provide potential options for exploring novel THz devices and for engineering high-level functionalities in metamaterial-based devices.

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Ultraslow long-living plasmons with electromagnetically induced transparency

Cited by 14 publications

References 29 publications

Hierarchical microstructures with high spatial frequency laser induced periodic surface structures possessing different orientations created by femtosecond laser ablation of silicon in liquids

Hierarchical microstructures with high spatial frequency laser induced periodic surface structures possessing different orientations created by femtosecond laser ablation of silicon in liquids

Fractal Plasmons on Cantor Set Thin Film

Controllable Fano-like Resonance in Terahertz Planar Meta-Rotamers

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