Nonreciprocal isolator based on a plasmonic magneto-optical resonator

Chen, Jing; Chen, Zongqiang; Li, Yudong; Sun, Qian; Xu, Jingjun

doi:10.1016/j.optcom.2019.124953

Cited by 6 publications

(2 citation statements)

References 22 publications

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“…Due to the interaction of the electromagnetic field in the insulator with the free electrons of the metal, electromagnetic waves propagate along the metal-dielectric interface, this phenomenon is called surface plasmon polaritons (SPPs) [1][2][3]. Outside the metal, there is an evanescent electric field that decreases exponentially with the distance from the surface of the metal, with a decay length of 0.2 to 0.3 of the wavelength of light.…”

Section: Introductionmentioning

confidence: 99%

Ultra wideband bandstop plasmonic filter in the NIR region based on stub resonators

et al. 2023

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In this study, we propose an ultra-wideband bandstop filter (UWB-BSF) using a plasmonic MIM waveguide coupled with a stub cavity that is investigated using finite-difference time-domain (FDTD). Air and silver are used as insulators and metals, respectively; silver is characterized by the Drude model. The structure can filter the optical telecommunication wavelengths of 1550 nm and 1310 nm. The transmission peak and the resonance wavelength of the basic structure can be tuned by varying the stub resonator’s length and width. In order to improve the filtering function of the bandstop filter at broad bandwidth in the NIR region with maximum transmission peak, the number of stub resonators is increased to two, three, and four stubs with properly studied lengths and a proper horizontal distance between each two stubs. The bandwidth is enhanced from 350 nm, with two stubs, to 620nm, with three stubs, and 770 nm, with four stubs, respectively. The corresponding filtered wavelength ranges are [1600nm-1950nm], [1330nm-1950nm] and [1180nm-1950nm] respectively. Moreover, with the increase in the number of stubs, the center wavelength achieves a blue shift to lower wavelengths. Further, the paper provides significant applications for plasmonic bandstop filters in highly integrated optical circuits.

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Section: Introductionmentioning

confidence: 99%

Ultra wideband bandstop plasmonic filter in the NIR region based on stub resonators

et al. 2023

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“…In addition, the weak character of magneto-optical effects prevents miniaturization of magnetooptical components, which must be large to provide sufficient nonreciprocal response. Although numerous solutions have been proposed, including photonic 7,[10][11][12][13][14] and plasmonic nanomaterials and microstructures [15][16][17][18][19][20] integrating magneto-optical media, these schemes have yet to be proven of technological relevance.…”

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confidence: 99%

All-optical nonreciprocity due to valley polarization pumping in transition metal dichalcogenides

et al. 2021

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Nonreciprocity and nonreciprocal optical devices play a vital role in modern photonic technologies by enforcing one-way propagation of light. Here, we demonstrate an all-optical approach to nonreciprocity based on valley-selective response in transition metal dichalcogenides (TMDs). This approach overcomes the limitations of magnetic materials and it does not require an external magnetic field. We provide experimental evidence of photoinduced nonreciprocity in a monolayer WS2 pumped by circularly polarized (CP) light. Nonreciprocity stems from valley-selective exciton population, giving rise to nonlinear circular dichroism controlled by CP pump fields. Our experimental results reveal a significant effect even at room temperature, despite considerable intervalley-scattering, showing promising potential for practical applications in magnetic-free nonreciprocal platforms. As an example, here we propose a device scheme to realize an optical isolator based on a pass-through silicon nitride (SiN) ring resonator integrating the optically biased TMD monolayer.

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Advances in Magnetic‐Field Assisted Photoelectrochemical Systems for Highly Efficient Conversion of Renewable Energy

Yan

et al. 2021

Adv Materials Inter

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Industry‐scaled water splitting is one of the achievements in the application chains of sustainable hydrogen energy. Numerous strategies have been used to increase the efficiency in photoelectricity (PE)/photoelectrochemistry (PEC) systems, involving enhancing charge transfers and active surface area. However, the efficiency of PE/PEC water splitting is still confined by the high overpotential of the PE/PEC reactions, unexpected loss of electron migration, and low stability of photocatalytic electrodes. Recently, various magnetically‐enhanced techniques have emerged as promising strategies to improve the conversion efficiency of renewable energy. Herein, this work summarizes recent progress on magnetically‐enhanced methods for promoting PEC water splitting performance. Then magnetism in the PE applications is discussed, such as magnetic sensors, modulators, and isolators. As a summary, future research directions and challenges of magnetic PEC with different magnetic effects and conditions are discussed for enhancing the PEC reactions.

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Nonreciprocal isolator based on a plasmonic magneto-optical resonator

Cited by 6 publications

References 22 publications

Ultra wideband bandstop plasmonic filter in the NIR region based on stub resonators

Ultra wideband bandstop plasmonic filter in the NIR region based on stub resonators

All-optical nonreciprocity due to valley polarization pumping in transition metal dichalcogenides

Advances in Magnetic‐Field Assisted Photoelectrochemical Systems for Highly Efficient Conversion of Renewable Energy

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