The Observation of Plasmonic Talbot Effect at Non-Illumination Side of Groove Arrays

Afshari-Bavil, Mehdi; Li, Xiaoping; Li, Chuanbo; Feng, Shuai; Dong, Mingli; Zhu, Lianqing

doi:10.1007/s11468-018-0765-8

Cited by 9 publications

(12 citation statements)

References 25 publications

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“…So, the complex amplitude distribution of light field intensity is related to the spatial optical path difference and the phase difference introduced by the incident wave. Similarly, the FWHM also can be estimated by the phase difference between two points as shown in Equation (10). For a given chemical potential, the FWHM of Talbot image decreases with the increase in incident wavelength [33].…”

Section: The Fwhm Properties Of the Talbot Imagesmentioning

confidence: 99%

“…It should be noted that variation of the duty cycle of graphene grating has no effect on the FWHM. This may be understood by Equation (10), where no duty cycle is involved.…”

Section: The Fwhm Properties Of the Talbot Imagesmentioning

confidence: 99%

“…The plasmonic Talbot effect occurs when surface plasmon waves are incident which is produced by the powerful interaction between the free electron oscillations and the electromagnetic field at the metal-dielectric interface. As new branch of self-imaging effect, the plasmonic Talbot effect breaks the diffraction limit [6][7][8][9][10][11] due to the excellent electromagnetic field confinement ability of plasmon [12][13][14][15][16]. However, in noble metals, huge ohmic loss prevents the plasmon from long distance propagation, and more seriously, it is difficult to tune the operating wavelength of the whole device once the geometric structure is determined [17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

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Tunable Plasmonic Talbot Effect Based on Graphene Monolayer

Zhou

et al. 2020

Applied Sciences

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In this article, the plasmonic Talbot effect supported by a graphene monolayer is investigated theoretically when surface plasmon polaritons (SPPs) are excited on the graphene. The Talbot effect distance is studied by varying the chemical potential, wavelength and the period of grating. The Talbot distance increases with the period in a parabolic way, and exhibits the opposite trends with respect to the chemical potential and wavelength. Moreover, the full width at half maximum (FWHM) of the Talbot image is recorded as a function of chemical potential and the wavelength. This study provides a new approach for sub-wavelength scale imaging and extends the applications of Talbot effect as well as graphene-based plasmonic devices.

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Section: The Fwhm Properties Of the Talbot Imagesmentioning

confidence: 99%

“…It should be noted that variation of the duty cycle of graphene grating has no effect on the FWHM. This may be understood by Equation (10), where no duty cycle is involved.…”

Section: The Fwhm Properties Of the Talbot Imagesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tunable Plasmonic Talbot Effect Based on Graphene Monolayer

Zhou

et al. 2020

Applied Sciences

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“…We set the structure parameters to be H = 150 nm, h = 20 nm, P = 1220 nm, and α = 0.5, which lead to W = d = 610 nm. Our proposed configuration was a broadband device [29] in the visible range. However, at a wavelength of 632.8 nm, the transmission was higher.…”

Section: Structure Description and Simulation Set Upmentioning

confidence: 99%

Geometrical condition for observing Talbot effect in plasmonics infinite metallic groove arrays

Mehdi¹,

Lou²,

Dong³

et al. 2018

Chinese Phys. B

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The plasmonics Talbot effect in metallic layer with infinite periodic grooves is presented in this study. Numerical approach based on the finite element method is employed to verify the derived Talbot carpet on the non-illumination side. The groove depth is less than the metallic layer thickness; however, for specific conditions, surface plasmons polaritons (SPPs) can penetrate through grooves, propagate under the metallic layer, and form Talbot revivals. The geometrical parameters are specified via groove width, gap size, period, and wavelength, and their proper values are determined by introducing two opening ratio parameters. To quantitatively compare different Talbot carpets, we introduce new parameters such as R-square that characterizes the periodicity of Talbot images. The higher the R-square of a carpet, the more coincident with non-paraxial approximation the Talbot distance becomes. We believe that our results can help to understand the nature of SPPs and also contribute to exploring this phenomenon in Talbot-image-based applications, including imaging, optical systems, and measurements.

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“…When the film is illuminated from the back side, the surface plasmonic polaritons (SPPs) are excited and form a Talbot carpet during propagation. As a new branch of self‐imaging effect, the plasmonic Talbot effect breaks the diffraction limit 11 due to the excellent electromagnetic field confinement ability of plasmon 12 . The lengthwise distance and depth modulation of Talbot imaging is achieved by many structures such as an array of beam‐steered metamaterial leaky‐wave antennas, 13 a graphene monolayer 14 and a grating with uneven phase layer thickness 15 .…”

Section: Introductionmentioning

confidence: 99%

Spatially tunable and self‐healing plasmonic Talbot imaging by using periodic metal nanopore arrays

Zhang

et al. 2023

Micro & Optical Tech Letters

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Plasmonic Talbot imaging exhibits unique advantages over conventional Talbot imaging owing to the potential possibility of the miniaturization and integration of optoelectronic devices. However, the fixed structure parameters limit imaging manipulation, and the defects of masks also affect imaging integrity. Here, we propose a plasmonic Talbot imaging scheme based on the periodic metal nanopore arrays to achieve spatially tunable and self-healing performance evaluated by the FDTD method. The results reveal that the transverse field distribution at the Talbot planes can be offset in the 500 nm range with the incident light angle changed from 0°to 25°, exhibiting a tunability of the spatial position. Meanwhile, the randomly missing and misaligned defects of such periodic metal nanopore arrays can be effectively restored by the presence of low density or defects located at the center. The feasibility of spatial tunability and self-healing may provide an opportunity for optical imaging, nanolithography, and phase manipulation.

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The Observation of Plasmonic Talbot Effect at Non-Illumination Side of Groove Arrays

Cited by 9 publications

References 25 publications

Tunable Plasmonic Talbot Effect Based on Graphene Monolayer

Tunable Plasmonic Talbot Effect Based on Graphene Monolayer

Geometrical condition for observing Talbot effect in plasmonics infinite metallic groove arrays

Spatially tunable and self‐healing plasmonic Talbot imaging by using periodic metal nanopore arrays

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