Surface plasmon Bragg grating using hybrid metal insulator metal plasmonic waveguide

Sharma, Prateeksha; Dinesh, Kumar V.

doi:10.1109/piers-fall.2017.8293603

Cited by 7 publications

(9 citation statements)

References 8 publications

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“…The track length of Bragg grating with parabolic profile is 3.48 μm using 12 cells, which is much smaller than previous reports, i.e. [16]. Fig.…”

Section: Analysis Results and Discussionmentioning

confidence: 55%

“…Most of the research reported [12][13][14][15] was in two dimensions and these are not of compact sizes. A 3D hybrid MIM plasmonic waveguide with rectangular Bragg grating is reported with width modulation in [16]. Though it is a realistic 3D structure, it shows poor transmission characteristics as it suffers from radiation losses due to the abruptness in the width variation.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Bragg gratings in planar hybrid metal–insulator–metal plasmonic waveguide using graded profile

Srivastava

Chitimireddy

Sharma

et al. 2019

Micro & Nano Letters

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The design of integrated components using hybrid plasmonics is attracting a widespread interest in the recent years. This work proposes a consistent approach to design Bragg gratings employing the concept of graded profile in a planar hybrid metal–insulator–metal plasmonic waveguide. A comparative study of various width modulations such as triangular, parabolic and rectangular profiles is presented. The most striking observation is that Bragg gratings with parabolic profile offer best performance in terms of compact track length (3.48 μm), wide stopband (168 nm) and good transmission characteristics with fewer side lobes. Additionally, a nanocavity analysis is performed by introducing a defect length of 140 nm in the Bragg grating structure with parabolic profile. A peak transmission of 89% is observed at the resonance wavelength of 1550 nm.

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“…The track length of Bragg grating with parabolic profile is 3.48 μm using 12 cells, which is much smaller than previous reports, i.e. [16]. Fig.…”

Section: Analysis Results and Discussionmentioning

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Investigation of Bragg gratings in planar hybrid metal–insulator–metal plasmonic waveguide using graded profile

Srivastava

Chitimireddy

Sharma

et al. 2019

Micro & Nano Letters

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“…3 a . The structure has been designed so that the following Bragg condition is met [11]:

Re (}{, N_{normaleff 1}) * l_{1} + Re (}{, N_{normaleff 2}) * l_{2} = \frac{λ_{B}}{2}

…”

Section: Principle and Designmentioning

confidence: 99%

“…The components like bends, couplers, power dividers, ring resonators and logic gates have been reported earlier based on HMIM plasmonic waveguides [8][9][10]. However, there are only a few reports on Bragg reflectors and filters based on HMIM plasmonic waveguide [11], but more are needed to be explored.…”

Section: Introductionmentioning

confidence: 99%

“…A Bragg structure based on HMI plasmonic waveguide with grating incorporated by periodically varying the thicknesses of dielectric layers has also been reported in [17]. Different from that a rectangular Bragg grating in an HMIM plasmonic waveguide has been reported recently which incorporates a periodic variation of waveguide width [11]. Though this is a realistic 3D structure, it suffers poor transmission in passband due to abrupt changes in waveguide width, resulting in significant radiation losses.…”

Section: Introductionmentioning

confidence: 99%

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Sinusoidal Bragg grating based on hybrid metal insulator metal plasmonic waveguide

Chitimireddy

Sharma

Vishwakarma

2018

Micro & Nano Letters

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This is the first report on 3D sinusoidal Bragg grating structure based on hybrid metal insulator metal (HMIM) plasmonic waveguide. The proposed structure has a gradual change in the refractive index rather than an abrupt change providing excellent filtering characteristics. The device is studied at an operating wavelength of 1.55 μm. The results are based on numerical simulations performed using the software CST microwave studio suite. The transmission characteristics show more than 80% transmission in the passband and near zero transmission in the rejection band. The proposed structure reduces the scattering losses and a wide bandgap of 0.387 μm is achieved. The proposed structure has a track length of 3.784 μm for 11 cells, which is very less compared to previous reports allowing large-scale integration of photonic devices. A microcavity is also formed and its resonance is investigated by introducing a defect length of 0.217 μm in the periodic structure. A peak transmission of 50% and a narrow resonance bandwidth of 0.029 μm are achieved at 1.55 μm resonance wavelength. The quality factor which defines the energy stored in the cavity is Q = 53.

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Color Gamut Behavior in Epsilon Near‐Zero Nanocavities during Propagation of Gap Surface Plasmons

Lio

Ferraro

Giocondo

et al. 2020

Advanced Optical Materials

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This work reports on numerical and experimental results obtained in plasmonic metal–insulator nanocavities. The systems are composed of silver as metal, and different materials as insulator, namely polyvinylpyrrolidone (PVP), indium tin oxide (ITO), and zinc oxide (ZnO). The proposed nanocavities exhibit extraordinary optical effects as tunable color hue, highlighted in gamut maps, depending on incident/viewing angles, extraordinary transmission and zero reflection at resonant wavelengths, for different incident polarizations. These phenomena are related to the formation of surface plasmon polaritons (SPPs) and gap surface plasmons (GSPs) whose presence is evidenced by a remarkable sigmoidal behavior of the pseudo dielectric function, with epsilon‐near‐zero singularities in its real and imaginary parts. This function is directly calculated from the measured ellipsometric parameters Ψ and Δ and allows probing, in a fast and effective way, the existence of the plasmonic modes. Moreover, in presence of these singularities, the ellispometric analysis of the systems also shows a pronounced dephasing between p‐ and s‐reflected beams that can lead to a Goos–Hänchen shift effect to be exploited for sensing applications. Thanks to their unusual optical properties, the proposed nanocavities open a wide scenario of applications in fields like tunable color filters, optics, photonics, physical security, and sensing.

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Surface plasmon Bragg grating using hybrid metal insulator metal plasmonic waveguide

Cited by 7 publications

References 8 publications

Investigation of Bragg gratings in planar hybrid metal–insulator–metal plasmonic waveguide using graded profile

Investigation of Bragg gratings in planar hybrid metal–insulator–metal plasmonic waveguide using graded profile

Sinusoidal Bragg grating based on hybrid metal insulator metal plasmonic waveguide

Color Gamut Behavior in Epsilon Near‐Zero Nanocavities during Propagation of Gap Surface Plasmons

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