The Role of Coupled Nanoplasmon Excitation in Growth Mechanism of Laser-Induced Self-Organized Nanostructures in AgCl-Ag Waveguide Thin Films

Kashani, Somaye; Nahal, Arashmid

doi:10.1007/s11468-016-0388-x

Cited by 4 publications

(3 citation statements)

References 30 publications

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“…Consequently, a periodic structure made of Ag-NPs is generated according to the interference pattern. Since the shape of an interference pattern depends on the wavelength and polarization states of the interfering lights, the formed SPNs inherently encode this information [9,10,16,21,25]. Without the AgCl layer, the TE n -mode cannot be excited, resulting in no interference and no formation of spontaneous periodic nanostructures.…”

Section: A) Sample Preparation and The Experimental Setupmentioning

confidence: 99%

“…1a), leading to the migration of metallic Ag-NPs into the minima of the interference pattern, forming self-organized periodic nanostructures (SPNs) according to the interference field (Fig. 1b) [9,[12][13][14][15][16]. The generated SPN acts as an entrance gate for modes into the AgCl slab waveguide.…”

Section: Introductionmentioning

confidence: 99%

“…The generated SPN acts as an entrance gate for modes into the AgCl slab waveguide. Increase in the intensity of the modes enhances the interference pattern contrast [16] leading to the acceleration of migration of Ag-NPs into the minima of the interference pattern. The better the SPN, the more intense the TE n -modes, resulting in an iterative process.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Photo-Induced Optical Activity of Crisscrossed Self-Organized Gratings in Photosensitive Nanolayers by Introducing Bi-Periodicity

Nahal,

Kiasatfar

2024

Preprint

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In the present work, the enhancement of photoinduced optical activity in a photosensitive nanolayer of AgCl doped by Ag nanoparticles, using bi-periodic crisscrossed self-organized periodic nanostructures (C-SPNs) is achieved. We found that the formation of two non-identical SPNs (i.e., with different periods), which crisscrossed each other, enhances the rotation of the polarization plane of the linear polarized probe beam, compared to the case when the two nanostructures are identical (i.e., having the same period). The difference in periods of the two C-SPNs increases the anisotropy of the medium, which in turn boosts the optical chirality produced by the formation of complex crisscrossed gratings made of Ag nanoparticles. The angle between the two gratings can be a control parameter for the amount and sign of rotation of the polarization plane of the probe beam. The enhanced optical activity of the bi-periodic C-SPNs, compared to the identical C-SPNs, can be attributed to the formation of more intricate chiral building blocks at the intersections of the two gratings.

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Section: A) Sample Preparation and The Experimental Setupmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhanced Photo-Induced Optical Activity of Crisscrossed Self-Organized Gratings in Photosensitive Nanolayers by Introducing Bi-Periodicity

Nahal,

Kiasatfar

2024

Preprint

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Tuning optical properties of noble metal nanoparticle-composed glasses by laser radiation

Nedyalkov

Koleva

Nikov

et al. 2019

Applied Surface Science

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Optical chirality in AgCl-Ag thin films through formation of laser-induced planar crossed-chain nanostructures

Nahal

Kashani

2017

Journal of Applied Physics

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Irradiation of AgCl-Ag thin films by a linearly polarized He-Ne laser beam results in the formation of self-organized periodic nanostructures. As a result of secondary irradiation of the initially exposed sample by the same linearly polarized He-Ne laser beam, but with different orientations of polarization, a complex crossed-chain nanostructure forms. We found that such a complex nanostructure has noticeable chirality and increased optical anisotropy, resulting in optical activity of the sample. Double exposure produces two gratings, crossing each other with angle α, which leads to the formation of crossed building blocks with chiroptical effects. It is established that the amount and the sign of the angle between the two laser-induced gratings (±α) determine the amount and the direction of rotation of the linearly polarized probe beam, respectively. We have also observed an induced anisotropy-dependent ellipticity for the probe light, which is passed through the sample. It is shown that the amount of ellipticity depends on the angle α.

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The Role of Coupled Nanoplasmon Excitation in Growth Mechanism of Laser-Induced Self-Organized Nanostructures in AgCl-Ag Waveguide Thin Films

Cited by 4 publications

References 30 publications

Enhanced Photo-Induced Optical Activity of Crisscrossed Self-Organized Gratings in Photosensitive Nanolayers by Introducing Bi-Periodicity

Enhanced Photo-Induced Optical Activity of Crisscrossed Self-Organized Gratings in Photosensitive Nanolayers by Introducing Bi-Periodicity

Tuning optical properties of noble metal nanoparticle-composed glasses by laser radiation

Optical chirality in AgCl-Ag thin films through formation of laser-induced planar crossed-chain nanostructures

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