Polarization-controlled dynamically switchable plasmon-induced transparency in plasmonic metamaterial

Nanoscale ◽  
2018 ◽  
Vol 10 (41) ◽  
pp. 19517-19523 ◽  
Author(s):  
Yonghong Ling ◽  
Lirong Huang ◽  
Wei Hong ◽  
Tongjun Liu ◽  
Jing Luan ◽  
...  
Keyword(s):  
Incident Light ◽  
Resonance Wavelength ◽  
Polarization Direction ◽  
Induced Transparency ◽  
Plasmon Induced Transparency

We propose a metamaterial to realize dynamically controllable PIT effect. Simply by changing the polarization direction of incident light, the number of PIT transparency windows can be increased from 1 to 2, accompanied with tunable amplitude and switchable resonance-wavelength.

Dynamically tunable plasmon-induced transparency effect based on graphene metasurfaces

2021 ◽  
Author(s):  
Shuxian Chen ◽  
Junyi Li ◽  
Zicong Guo ◽  
Li Chen ◽  
Kunhua Wen ◽  
...  
Keyword(s):  
Modulation Depth ◽  
Incident Light ◽  
Polarization Angle ◽  
Refractive Index Sensitivity ◽  
Coupled Mode ◽  
Terahertz Devices ◽  
Index Sensitivity ◽  
Induced Transparency ◽  
Difference Time ◽  
Plasmon Induced Transparency

Abstract Plasmon-induced transparency (PIT) is theoretically explored with a graphene metamaterial using finite-difference time-domain numerical simulations and coupled-mode-theory theoretical analysis. In this work, the proposed structure is consisted of one rectangular cavity and three strips to generate the PIT phenomenon. The PIT window can be regulated dynamically by adjusting the Fermi level of the graphene. Importantly, the modulation depth of the amplitude can reach 90.4%. The refractive index sensitivity of the PIT window is also investigated, and the simulation result shows that a sensitivity of 1.335 THz/RIU is achieved. Additionally, when the polarization angle of the incident light is changed gradually from 0˚ to 90˚, the performances of the structure are greatly affected. Finally, the proposed structure is particularly enlightening for the design of dynamically tuned terahertz devices.

Tunable anisotropic plasmon-induced transparency in black phosphorus-based metamaterials

2021 ◽  
Author(s):  
Li Huang ◽  
Zhongpeng Jia ◽  
Bin Tang
Keyword(s):  
Slow Light ◽  
Incident Light ◽  
Fdtd Method ◽  
Infrared Region ◽  
Photonic Devices ◽  
Black Phosphorus ◽  
Lorentz Oscillator ◽  
New Type ◽  
Induced Transparency ◽  
Plasmon Induced Transparency

Abstract Black phosphorus (BP), as a new type of two-dimensional material, has drawn considerable interest because of its distinct physics and electronic characteristics. In this work, we theoretically present a BP-based metamaterial, unit cell of which is composed of a rectangular BP nano-patch and two parallel BP strips. The research results indicate that tunable anisotropic plasmon-induced transparency (PIT) effect can be achieved in the presented metamaterials when the polarization of incident light is along armchair and zigzag directions of BP crystal, respectively. Moreover, the spectra responses and group delay accompanied by the PIT effect can be actively controlled by adjusting the carrier density and geometric parameters. The electromagnetic simulation results calculated by finite-difference time-domain (FDTD) method show good agreement with the coupled Lorentz oscillator model. Our proposed nanostructure provides a new path for designing photonic devices such as slow light and photodetector in the mid-infrared region.

Quadruple plasmon-induced transparency and tunable multi-frequency switch in monolayer graphene terahertz metamaterial

2022 ◽  
Author(s):  
Yuhui Li ◽  
Yiping Xu ◽  
Jiabao Jiang ◽  
Liyong Ren ◽  
Shubo Cheng ◽  
...  
Keyword(s):  
Electric Field ◽  
Modulation Depth ◽  
Spectral Response ◽  
Incident Light ◽  
Extinction Ratio ◽  
Fdtd Method ◽  
Monolayer Graphene ◽  
Destructive Interference ◽  
Induced Transparency ◽  
Plasmon Induced Transparency

Abstract A monolayer graphene metamaterial composed of a graphene block and four graphene strips, which has the metal-like properties in terahertz frequency range, is proposed to generate an outstanding quadruple plasmon-induced transparency (PIT). Additional analyses show that the forming physical mechanism of the PIT with four transparency windows can be explained by strong destructive interference between the bright mode and the dark mode, and the distributions of electric field intensity and electric field vectors under the irradiation of the incident light. Coupled mode theory (CMT) and finite-difference time-domain (FDTD) method are employed to study the spectral response characteristics of the proposed structure, and the theoretical and simulated results are in good agreement. It is found that a tunable multi-frequency switch and excellent optical storage can be achieved in the wide PIT window. The maximum modulation depth is up to 99.7%, which corresponds to the maximum extinction ratio of 25.04 dB and the minimum insertion loss of 0.19 dB. In addition, the time delay is as high as 0.919 ps, the corresponding group refractive index is up to 2755. Thus, the proposed structure provides a new method for the design of terahertz multi-frequency switches and slow light devices.

Ultrasensitive and Tunable Sensor Based on Plasmon-Induced Transparency in a Black Phosphorus Metasurface

Plasmonics ◽  
2021 ◽  
Author(s):  
Hao Chen ◽  
Lei Xiong ◽  
Fangrong Hu ◽  
Yuanjiang Xiang ◽  
Xiaoyu Dai ◽  
...  
Keyword(s):  
Black Phosphorus ◽  
Induced Transparency ◽  
Plasmon Induced Transparency

Tunable Plasmon Induced Transparency in a Metallodielectric Grating Coupled With Graphene Metamaterials

2017 ◽  
Vol 35 (23) ◽  
pp. 5142-5149 ◽  
Author(s):  
Tian Zhang ◽  
Jian Dai ◽  
Yitang Dai ◽  
Yuting Fan ◽  
Xu Han ◽  
...  
Keyword(s):  
Induced Transparency ◽  
Plasmon Induced Transparency

Three-Dimensional Finite-Difference Time-Domain Method Modeling of Nanowire Optical Probe

2014 ◽  
Vol 602-605 ◽  
pp. 3359-3362
Author(s):  
Chun Li Zhu ◽  
Jing Li
Keyword(s):  
Finite Difference ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
Incident Light ◽  
Near Field ◽  
Three Dimensional ◽  
Polarization Direction ◽  
Near Field Imaging ◽  
Difference Time ◽  
Field Imaging

In this paper, output near fields of nanowires with different optical and structure configurations are calculated by using the three-dimensional finite-difference time-domain (3D FDTD) method. Then a nanowire with suitable near field distribution is chosen as the probe for scanning dielectric and metal nanogratings. Scanning results show that the resolution in near-field imaging of dielectric nanogratings can be as low as 80nm, and the imaging results are greatly influenced by the polarization direction of the incident light. Compared with dielectric nanogratings, metal nanogratings have significantly enhanced resolutions when the arrangement of gratings is perpendicular to the polarization direction of the incident light due to the enhancement effect of the localized surface plasmons (SPs). Results presented here could offer valuable references for practical applications in near-field imaging with nanowires as optical probes.

Plasmon-Induced Transparency and Dispersionless Slow Light in a Novel Metamaterial

2015 ◽  
Vol 27 (11) ◽  
pp. 1177-1180 ◽  
Author(s):  
Jiakun Song ◽  
Jietao Liu ◽  
Yuzhi Song ◽  
Kangwen Li ◽  
Zuyin Zhang ◽  
...  
Keyword(s):  
Slow Light ◽  
Induced Transparency ◽  
Plasmon Induced Transparency
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