Customizing plasmonic diffraction patterns by laser interference

Peláez, R. J.; Ferrero, Alejandro; Škereň, Marek; Bernad, Berta; Campos, J.

doi:10.1039/c7ra02878d

Cited by 2 publications

(2 citation statements)

References 43 publications

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“…Among many applications, subwavelength pitch periodic structures in DLC:Ag nanocomposite films can be applied for refractive index sensing . The arrangement of nanoparticles in diffraction grating‐like periodic structures modifies the effective refractive index and alters the diffraction efficiency of the periodic structure, which is required to be as high as possible for the most optical applications, especially for increased sensitivity of plasmonic diffractive optical sensors and resonator structures . Tailored nanostructures are also very promising materials for the enhancement of the efficiency of solar cells via light trapping and plasmonic scattering mechanisms …”

Section: Introductionmentioning

confidence: 99%

“…[28] The arrangement of nanoparticles in diffraction grating-like periodic structures modifies the effective refractive index and alters the diffraction efficiency of the periodic structure, which is required to be as high as possible for the most optical applications, especially for increased sensitivity of plasmonic diffractive optical sensors and resonator structures. [29,30] Tailored nanostructures are also very promising materials for the enhancement of the efficiency of solar cells via light trapping and plasmonic scattering mechanisms. [31,32] In this work, we demonstrate an application of DLIP for the fabrication of 1D periodic structures with subwavelength features in amorphous hydrogenated DLC (a-C:H, further in the text DLC) nanocomposite thin films with embedded silver nanoparticles (DLC:Ag, 7.9-14.1 at% Ag).…”

Section: Introductionmentioning

confidence: 99%

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Tailoring of Silver Nanoparticle Size Distributions in Hydrogenated Amorphous Diamond‐Like Carbon Nanocomposite Thin Films by Direct Femtosecond Laser Interference Patterning

et al. 2019

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Patterning of nanocomposites by conventional lithography processes is problematic due to the different physical properties of matrix and filler. Direct laser interference patterning (DLIP) promises rapid micromachining of virtually any material with subwavelength resolution. A control of intense laser light modifies the filler particle size distribution in nanocomposite films. Herein, DLIP of periodic patterns with half‐pitch <1 μm in reactive magnetron‐sputtered hydrogenated amorphous diamond‐like carbon nanocomposite thin films with embedded silver nanoparticles (DLC:Ag) is demonstrated. Periodic patterns of regularly repeating areas with modified size distributions of silver nanoparticles are obtained by a variation of fluences and number of pulses of 515 nm wavelength femtosecond laser. Depending on the silver content in nanocomposite films, nanoparticle size distributions are either bimodal (for 14.1 at% Ag containing films) or unimodal (7.9 at%) with effective average diameters shifting from 13 to 69 nm, depending on the laser processing parameters. The importance of localized surface plasmon absorption and localized field enhancement at the DLC–Ag interface for lowering the ablation threshold of DLC:Ag nanocomposites below 6 mJ cm−2 at 1000 pulses is demonstrated. This is at least four times lower than the threshold for pure DLC obtained using the same DLIP setup.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tailoring of Silver Nanoparticle Size Distributions in Hydrogenated Amorphous Diamond‐Like Carbon Nanocomposite Thin Films by Direct Femtosecond Laser Interference Patterning

et al. 2019

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Observation of Plasmonics Talbot effect in graphene nanostructures

Farmani,

Omidniaee

2024

Sci Rep

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We report on the theoretical models of the plasmoincs Talbot effect in graphene nanostructure. The Talbot effect for the plasmonics applications in the IR range is theoretically studied and the respective Talbot effect for the novel advanced plasmonics structures are numerically investigated for the first time. It is shown that the metamaterial structures with periodic grating configuration represents a complex three-dimensional lattice of beamlet-like graphene plasmonics devices. The calculated results agree well with the experimental ones. The results obtained can be used to create and optimize the structures considering diffraction limit for a wide range of application areas. Effective focusing of plasmonic waves with exact focal spots and a subwavelength full width at half maximum can be obtained by using periodic graphene grating.

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Customizing plasmonic diffraction patterns by laser interference

Abstract: This work reports a versatile and efficient production of periodic microstructures surrounded by metallic alloy nanoparticles supported on glass with customized visible diffraction patterns by using the technique of phase mask laser interference.

Cited by 2 publications

References 43 publications

Tailoring of Silver Nanoparticle Size Distributions in Hydrogenated Amorphous Diamond‐Like Carbon Nanocomposite Thin Films by Direct Femtosecond Laser Interference Patterning

Tailoring of Silver Nanoparticle Size Distributions in Hydrogenated Amorphous Diamond‐Like Carbon Nanocomposite Thin Films by Direct Femtosecond Laser Interference Patterning

Observation of Plasmonics Talbot effect in graphene nanostructures

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