Simulations of Dielectric and Plasmonic Waveguide-Coupled Ring Resonators Using the Legendre Pseudospectral Time-Domain Method

Chung, Shih-Yung; Wang, Chih-Yu; Cheng, Teng; Chen, Chung-Ping; Chang, Hung-Chun

doi:10.1109/jlt.2012.2188851

Cited by 9 publications

(3 citation statements)

References 20 publications

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“…However, the disadvantage of the waveguide lies obviously in its perpendicular waveguide coupling. Several structures have been proposed to suppress the coupling interference [30], with altering the optical characteristics of the resonators with rectangularring cavity. Here, basing on the primary ring structure, we apply bends before and after the coupling section in the I/O waveguide to avoid the coupling waves to propagate backward and enhance the resonant performance, as shown in Figure 1(b).…”

Section: Device Structure and Theoretical Analysismentioning

confidence: 99%

“…Thus, it is necessary to solve the over-coupling problem in optical region with some structural modifications. Many different ring structures which can reduce the interference have been analyzed [30], such as circular-shaped and racetrack-shaped ring waveguides, but that changes the optical behaviors of the resonators with rectangular-ring cavity. In this paper, for the first time, we embed bends in the input/output (I/O) waveguide to suppress the vertical coupling disturbance and enhance the resonant performance without altering the rectangular ring structure.…”

Section: Introductionmentioning

confidence: 99%

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A Simple Nanoscale Plasmonic Square-Shaped Ring Resonator Waveguide

Yan¹,

Fu²,

Gong³

et al. 2015

PIER Letters

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Abstract-A novel surface plasmon based square-shaped ring resonator with bending metal-dielectricmetal input/output (I/O) waveguide at optical spectral range is investigated. The influence of various geometric parameters is studied in detail, with parallel finite difference time domain method. The results validate that vertical coupling disturbance can be efficiently suppressed by employing the modified I/O structure. The transmittance performance has all the resonant frequencies workable with better extinction ratios, higher finesse and higher Q-factors compared to the original plasmonic micro-ring resonator. From these analyses, it is found that the proposed waveguide is outstanding in aspects of the total field extinction and frequency selectivity characteristic.

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Section: Device Structure and Theoretical Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Simple Nanoscale Plasmonic Square-Shaped Ring Resonator Waveguide

Yan¹,

Fu²,

Gong³

et al. 2015

PIER Letters

View full text Add to dashboard Cite

show abstract

“…Metallic V-shaped groove, wedge and coupled wedges structures [6][7][8][9] have been proposed to overcome the optical diffraction limit of waveguides while keeping the relatively low power losses, which is mainly due to the folded electromagnetic fields near the metallic nano-trench structure [10]. To demonstrate that the power losses are sufficient low, the nanoplasmonic waveguide based passive optical devices were investigated theoretically and experimentally [11][12][13][14][15]. In general, the insertion losses of SPP-based passive optical devices can be higher than 3 dB, which limited the practical application in integrated optical circuits (IOCs).…”

Section: Introductionmentioning

confidence: 99%

Power Loss Reduction of Angled Metallic Wedge Plasmonic Waveguides via the Interplay between Near-Field Optical Coupling and Modal Coupling

Liao

Wu²,

Thakur³

et al. 2022

Photonics

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Coupled metallic-wedge nano-plasmonic (CWP) waveguides were predicted as the best building blocks, which can realize ultra-compact and broadband integrated optical circuits (IOCs) due to the localized near-field distributions at the dielectric/metal interfaces. Our simulation results show that the manipulations of the near-field distribution and the near-field modal coupling in CWP waveguides can effectively minimize the power loss by varying the wedge angles, which can avoid the loss from the metallic structure and thereby improving the practical application in IOCs.

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Nanophotonic structure inverse design for switching application using deep learning

Adibnia,

Ghadrdan,

Mansouri-Birjandi

2024

Sci Rep

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Switching functionality is pivotal in advancing communication systems, serving as a paramount mechanism. Despite numerous innovations in this field, optical switch design, fabrication, and characterization have traditionally followed an iterative approach. Within this paradigm, the designer formulates an informed conjecture regarding the switch's structural configuration and subsequently resolves Maxwell's equations to ascertain its performance. Conversely, the inverse problem, which entails deriving a switch geometry to achieve a targeted electromagnetic response, continues to pose formidable challenges and necessitates substantial time and effort, particularly under the constraints of specific assumptions. In this work, we propose a deep neural network-based method to approximate the spectral transmittance of all-optical switches. The findings substantiate the efficacy of deep learning in the design of all-optical plasmonic switches, which are renowned as the fastest switches at the nanoscale. The nonlinear Kerr effect in square resonators is leveraged to demonstrate the switching performance. Juxtaposed with conventional simulations, the proposed model showcases a remarkable improvement in computational efficiency. Furthermore, deep learning can resolve nanophotonic inverse design problems without reliance on trial-and-error or empirical strategies. Compared to simulations, the mean squared error for both forward and inverse models is meager, with values of around 0.03 and 0.02, respectively. The deep learning-proposed switches exhibit excellent suitability for integration into photonic integrated circuits, substantially influencing the progression of all-optical signal processing.

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Simulations of Dielectric and Plasmonic Waveguide-Coupled Ring Resonators Using the Legendre Pseudospectral Time-Domain Method

Cited by 9 publications

References 20 publications

A Simple Nanoscale Plasmonic Square-Shaped Ring Resonator Waveguide

A Simple Nanoscale Plasmonic Square-Shaped Ring Resonator Waveguide

Power Loss Reduction of Angled Metallic Wedge Plasmonic Waveguides via the Interplay between Near-Field Optical Coupling and Modal Coupling

Nanophotonic structure inverse design for switching application using deep learning

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