Electrically tunable electromagnetically induced transparency in superconducting terahertz metamaterials

Li, Chun; Li, Weili; Duan, Siyu; Wu, Jingbo; Chen, Benwen; Yang, Shengxin; Su, Runfeng; Jiang, Chengtao; Zhang, Caihong; Jin, Biaobing; Jiang, Ling; Kang, Lin; Xu, Wei; Chen, Jian; Wu, Peiheng

doi:10.1063/5.0056489

Cited by 11 publications

(5 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although the THz EIT metamaterials integrated with the superconducting have a larger modulation of 87%, it requires an extremely low temperature of 4.5 K that limits its practical applications. [ 67 ] The bright mode is directly excited by the incident THz wave polarized along the y ‐direction that presents the dipole‐allowed switching |0>→|1>. The dipole‐forbidden switching |0>→|2> represents the dark mode in the DSRR.…”

Section: Resultsmentioning

confidence: 99%

Nonvolatile Reconfigurable Electromagnetically Induced Transparency with Terahertz Chalcogenide Metasurfaces

Liu

Chen

Lian

et al. 2022

Laser & Photonics Reviews

View full text Add to dashboard Cite

Metasurface analog of electromagnetically induced transparency (EIT) provides a compact platform for generating a narrow-band transmission window with very sharp spectral features. They hold promise for many appealing applications including ultrasensitive detectors, slow-light devices, nonlinear optical devices etc. In particular, reconfigurable EIT metasurfaces are crucial for expanding the capability of light field control, which are promising for terahertz (THz) communications and optical networks. Yet, the investigation on reconfigurable EIT metasurfaces with nonvolatile operation remains scarce. Here, reversible switching of the metasurface-induced transparency in the THz spectrum is experimentally realized. The reconfigurable response (reversible spectral shift) is obtained by integrating a nonvolatile chalcogenide phase change material, Ge 2 Sb 2 Te 5 (GST225) into the meta-atoms. A giant reversible switching of EIT takes place under an excitation of nanosecond laser pulses, showing a reconfigurable group delay of the THz waves. The proposed reconfigurable THz metadevices may provide a new route for the ultrafast laser induced switching and reconfigurable slow-light devices.

show abstract

Section: Resultsmentioning

confidence: 99%

Nonvolatile Reconfigurable Electromagnetically Induced Transparency with Terahertz Chalcogenide Metasurfaces

Liu

Chen

Lian

et al. 2022

Laser & Photonics Reviews

View full text Add to dashboard Cite

show abstract

“…Organic semiconductors are reported as high-speed photoconductive THz SLMs [ 104 ]. Metasurfaces made of superconductive materials are also good candidates for electrically controlled spatial modulation with large modulation depth [ 105 ]. Ge 2 Sb 2 Te 5 can be repeatedly switched among amorphous, crystalline and intermediate states with the help of nanosecond laser pulses and thermal annealing, enabling nonvolatile, reconfigurable, multi-level and broadband SLMs [ 106 , 107 ].…”

Section: Discussion Of Modulation Specificationsmentioning

confidence: 99%

Recent Progress of Terahertz Spatial Light Modulators: Materials, Principles and Applications

2022

View full text Add to dashboard Cite

Terahertz (THz) technology offers unparalleled opportunities in a wide variety of applications, ranging from imaging and spectroscopy to communications and quality control, where lack of efficient modulation devices poses a major bottleneck. Spatial modulation allows for dynamically encoding various spatial information into the THz wavefront by electrical or optical control. It plays a key role in single-pixel imaging, beam scanning and wavefront shaping. Although mature techniques from the microwave and optical band are not readily applicable when scaled to the THz band, the rise of metasurfaces and the advance of new materials do inspire new possibilities. In this review, we summarize the recent progress of THz spatial light modulators from the perspective of functional materials and analyze their modulation principles, specifications, applications and possible challenges. We envision new advances of this technique in the near future to promote THz applications in different fields.

show abstract

“…Exploring high Q-factor resonance has always been one of the important subjects across different branches of physics such as optics, electromagnetics and nanophotonics, 1,2 because it has great promise for both fundamental research and device applications, including in the terahertz (THz) frequency. [3][4][5][6][7][8][9][10][11][12][13][14][15] Most reported works about THz high-Q resonances focused on electrical resonances, [10][11][12][16][17][18][19][20][21] in which different split ring resonators (SRRs) configurations are frequently used. [10][11][12][17][18][19][20][21] For instance, an high Q-factor about the 10 4 level was proposed.…”

Section: Textmentioning

confidence: 99%

Terahertz high-Q magnetic dipole resonance induced by coherent Fano interactions

Yan

et al. 2022

Applied Physics Letters

View full text Add to dashboard Cite

High Q-factor resonance holds great promise for bio-chemical sensing and enhanced light–matter interaction. However, terahertz (THz) magnetic resonances usually demonstrate low Q-factors, resulting in huge energy radiation loss particularly in high frequency bands. Here, we show that high Q-factor magnetic dipole resonance at THz frequencies can be achieved by exploiting the coherent Fano interactions with strong field enhancements in an array composed of single metallic split-ring resonators, working at Wood–Rayleigh anomalies. It can give rise to ultrahigh Q-factor beyond 104 in the THz regime. Experimentally, the measured Q-factor of dominant magnetic dipole resonance can achieve no less than a level of ∼261 by Lorentzian fitting to the experimental data. In addition, a high Q-factor of the fundamental-order magnetic dipole resonance is demonstrated beyond 30. High- Q magnetic dipole resonance is closely associated with ultralow-damping and negative permeability in the THz band. The measurements of magnetic dipole resonances are in good agreement with the theoretical analyses. Our scheme suggests a feasible route to suppress radiative loss for enhanced THz field-matter interaction.

show abstract

Electrically tunable electromagnetically induced transparency in superconducting terahertz metamaterials

Cited by 11 publications

References 46 publications

Nonvolatile Reconfigurable Electromagnetically Induced Transparency with Terahertz Chalcogenide Metasurfaces

Nonvolatile Reconfigurable Electromagnetically Induced Transparency with Terahertz Chalcogenide Metasurfaces

Recent Progress of Terahertz Spatial Light Modulators: Materials, Principles and Applications

Terahertz high-Q magnetic dipole resonance induced by coherent Fano interactions

Contact Info

Product

Resources

About