Tunable Toroidal Dipolar Resonance for Terahertz Wave Enabled by a Vanadium Dioxide Metamaterial

Song, Zhengyong; Deng, Yide; Zhou, Yuanguo; Liu, Zhaoyuan

doi:10.1109/jphot.2019.2907617

Cited by 23 publications

(7 citation statements)

References 33 publications

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“…Firstly, we intend to discuss the toroidal excitations in 3D plasmonic metamaterial structures 9,97,98,131,132 . In the next section, the planar designs for toroidal excitations are reviewed, which greatly simplifies the fabrication of toroidal metamaterials 100,102,122,129,133‐138 . Finally, we expatiate the research proceeding on toroidal excitations in plasmonic cavities 101,139‐142 …”

Section: Toroidal Excitations In Plasmonic Metamaterialsmentioning

confidence: 99%

“…9,97,98,131,132 In the next section, the planar designs for toroidal excitations are reviewed, which greatly simplifies the fabrication of toroidal metamaterials. 100,102,122,129,[133][134][135][136][137][138] Finally, we expatiate the research proceeding on toroidal excitations in plasmonic cavities. 101,[139][140][141][142] 2.1 | 3D plasmonic structures for the toroidal excitations…”

Section: Toroidal Excitations In Plasmonic Metamaterialsmentioning

confidence: 99%

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Subwavelength optical localization with toroidal excitations in plasmonic and Mie metamaterials

Yang

Shen

et al. 2021

InfoMat

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Since the performance of electronic circuits is becoming rather limited in face of intensively increasing of amount of information and related operations, all‐optical processing offers a promising strategy for future information system. It would benefit a great deal if the all‐optical processing could be implemented within the developed electronic chips of nanoscale structures. In that it is highly desirable to break the diffraction limit of light for achieving effective light manipulations with deep subwavelength structures compatible with the state‐of‐the‐art nanofabrication processes. It is of fundamental importance to get subwavelength optical localization, that is, squeeze light wave into subwavelength space for achieving freely manipulating of light fields. This review summarizes the development in realizing subwavelength optical localization by exciting toroidal mode in photonic metamaterials. The toroidal excitations in plasmonic metamaterials and Mie resonant metamaterials, in 3D structures and planar metamaterials, with single or few layers in spectral regime from microwave to optical frequencies are surveyed. Based on the discussion on the configurations of toroidal excitations, the recent development on toroidal‐related optical scattering control actively manipulates the toroidal excitations, and promising applications are further investigated and highlighted.

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Section: Toroidal Excitations In Plasmonic Metamaterialsmentioning

confidence: 99%

Section: Toroidal Excitations In Plasmonic Metamaterialsmentioning

confidence: 99%

Subwavelength optical localization with toroidal excitations in plasmonic and Mie metamaterials

Yang

Shen

et al. 2021

InfoMat

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“…Rich biological and material information based on the vibrational and rotational frequencies of biomacromolecules can be obtained in the THz range. , Utilizing the characteristics between the anapole mode and metamaterials in the THz region could provide a brilliant performance . THz devices require active manipulation of the resonance, which is now driving the development of tunable metamaterials. − The synthetic silicon metamaterials with a leapfrog resonance blueshift and phase tunability are discussed as elements of modulators by Cojocari et al Song et al show a toroidal switch in the THz region, which can actively tune the amplitude of the resonance by VO 2 . However, there is still an insurmountable difficulty to achieve continuous tuning of the resonance.…”

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confidence: 99%

Tunable Terahertz Metamaterials Based on Anapole Excitation with Graphene for Reconfigurable Sensors

Liu

Hua

et al. 2020

ACS Appl. Nano Mater.

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Anapole mode is excited by the destructive interference between the toroidal-and electric-dipole moments, resulting in a highquality (Q) factor. In this paper, we designed a high-Q-factor metamaterial that shows anapole behaviors in the terahertz region. Through the introduction of graphene, the destructive interference condition is disturbed and tunability can be realized. This pattern reflects a brilliant tunability performance in which frequency movements above 250 GHz per 0.1 eV can be verified. Ingenious adjustment by the position of graphene offers the possibility of diversified tuning capabilities. Such a tunable terahertz metamaterial has great potential in reconfigurable sensors.

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“…Apart from the above study, there is an ongoing race to enhance the performance of metaswitches using toroidal metasurfaces. [ 75,78,227 ] Specifically, at the telecommunication bandwidth, the toroidal metasurface concept has addressed some of the current limitations (e.g., MD, insertion loss) of traditional optical metaswitches. As discussed earlier in this section, optothermally tunable compounds (e.g., PCMs) have an undeniable role in improving the functionality of optical devices.…”

Section: Active Hybrid Toroidal Metamodulatorsmentioning

confidence: 99%

Toroidal Metaphotonics and Metadevices

Ahmadivand

Gerislioglu

Ahuja

et al. 2020

Laser & Photonics Reviews

100

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Toroidal moments in artificial media have received growing attention and considered as a promising framework for initiating novel approaches to manage intrinsic radiative losses in nanophotonic and plasmonic systems. In the past decade, there has been substantial attention on the characteristics and excitation methods of toroidal multipoles-in particular, toroidal dipole-in 3D bulk and planar metaplatforms. The remarkable advantages of toroidal resonances have thrust the toroidal metasurface technology from relative anonymity into the limelight, in which researchers have recently centered on developing applied optical and optoelectronic subwavelength devices based on toroidal metaphotonics and metaplasmonics. In this focused contribution, the key principles of 3D and flatland toroidal metastructures are described, and the revolutionary tools that have been implemented based on this topology are briefly highlighted. Infrared photodetectors, immunobiosensors, ultraviolet beam sources, waveguides, and functional modulators are some of the fundamental and latest examples of toroidal metadevices that have been introduced and studied experimentally so far. The possibility of the realization of strong plexciton dynamics and pronounced vacuum Rabi oscillations in toroidal plasmonic metasurfaces are also presented in this review. Ultimate efficient extreme-subwavelength scale devices, such as low-threshold lasers and ultrafast switches, are thus in prospect.

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Tunable Toroidal Dipolar Resonance for Terahertz Wave Enabled by a Vanadium Dioxide Metamaterial

Cited by 23 publications

References 33 publications

Subwavelength optical localization with toroidal excitations in plasmonic and Mie metamaterials

Subwavelength optical localization with toroidal excitations in plasmonic and Mie metamaterials

Tunable Terahertz Metamaterials Based on Anapole Excitation with Graphene for Reconfigurable Sensors

Toroidal Metaphotonics and Metadevices

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