Distribution of THz electric field in the split-ring resonator metamaterials based on the thin film geometry

doi:10.1016/j.cap.2015.12.018

Current Applied Physics

Volume 16, Issue 3, March 2016, Pages 329-334

https://doi.org/10.1016/j.cap.2015.12.018 Get rights and content

Highlights

•
Distribution of THz electric field is investigated in the split-ring-resonator metamaterials.
•
Split-ring-resonator/thin film/substrate structures are examined.
•
The optimal film configuration is suggested to achieve the large field enhancement particularly in the thin film layer.

Abstract

We investigate THz response of split-ring resonator prepared on the polyimide film grown on the Si substrate. We observe a strong thickness dependence of the resonance frequency which is attributed to the change in the effective dielectric constant. From the finite-difference time-domain simulation, we reproduce experimental results, and find large variations of the electric field profile depending on the polyimide thickness. We discuss the optimal film configuration to achieve the large enhancement of THz electric field which depends strongly on thicknesses and optical constants of constituent layers.

Section snippets

Conclusions

In summary, we investigated the THz electric field enhancement around the split-ring resonator prepared on the polyimide film grown on the Si substrate and also its complementary structure. Depending on the dielectric constant of the relatively thin film layer compared to that of the thick substrate layer, the field enhancement can be maximized beneath the SRR pad or the central gap region of the SRR. When investigating the non-equilibrium state induced by the strong THz electric field, it is

Acknowledgments

This work was supported in part by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (Nos. 2015R1A1A1A05001560, NRF-2015R1A5A1009962, and NRF-2015R1A5A1009962), and also by the Top Brand Project and Advanced Photonics Research Institute (APRI) research program (Asian Laser Center) through a grant provided by the Gwangju Institute of Science and Technology in 2015.

References (22)

R. Liu et al.
Science
(2009)
J. Zhu et al.
Opt. Commun.
(2011)
D. Park et al.
Curr. Appl. Phys. Lett.
(2014)
J.B. Pendry
Phys. Rev. Lett.
(2000)
J.B. Pendry et al.
Science
(2006)
N. Fang et al.
Science
(2005)
S. Nie et al.
Science
(1997)
V. Kravets et al.
Nat. Mater.
(2013)
H. Merbold et al.
Opt. Express
(2011)
M. Seo et al.
Nat. Phot.
(2009)

H.-T. Chen et al.

Nature

(2006)

Cited by (7)

Terahertz metadevices for silicon plasmonics
2022, Chip
Metamaterial devices (metadevices) have been developed in progress aiming to generate extraordinary performance over traditional devices in the (sub-)terahertz (THz) domain, and their planar integration with complementary-metal-oxide-semiconductor (CMOS) circuits pave a new way to build miniature silicon plasmonics that overcomes existing challenges in chip-to-chip communication. In an effort towards low-power, crosstalk-tolerance, and high-speed data link for future exascale data centers, this article reviews the recent progress on two metamaterials, namely, the spoof surface plasmon polaritons (SPPs), and the split-ring resonator (SRR), as well as their implementations in silicon, focusing primarily on their fundamental theories, design methods, and implementations for future THz communications. Owing to their respective dispersion characteristic at THz, these two metadevices are highly expected to play an important role in miniature integrated circuits and systems toward compact size, dense integration, and outstanding performance. A design example of a fully integrated sub-THz CMOS silicon plasmonic system integrating these two metadevices is provided to demonstrate a dual-channel crosstalk-tolerance and energy-efficient on-off keying (OOK) communication system. Future directions and potential applications for THz metadevices are discussed.
Electrically tunable terahertz metamaterials based on graphene stacks array
2017, Superlattices and Microstructures
With the ability of tuning chemical potential via gate voltage, the permittivity of graphene stack can be dynamically adjusted over a wide range. In this paper, we design electrically tunable metamaterials based on the graphene/Al₂O₃ stacks array, which can achieve a good modulation of resonant frequency and peak value in terahertz region. Due to the enlargement of plasmonic resonance response and the broaden distribution of electric field, our proposed structures perform a better tunability compared with traditional metamaterials loaded monolayer graphene. Since the dipole-dipole coupling between adjacent stacks strengthens immensely as reduces the filling factor of array, the modulated capacity could be further improved. It is found that for oblique incidence, the transmission property is also sensitive to the chemical potential of graphene as well as the polarization direction of incident terahertz wave. These results could be very instructive for the potential applications in voltage-sensitive devices, tunable sensors and photovoltaic switches.
Structurally tunable reflective metamaterial polarization transformer based on closed fish-scale structure
2017, Current Applied Physics
Citation Excerpt :
It is well known that the conventional polarization transformers are based on the mechanism of birefringence and/or total internal reflection which always limit the working bandwidth in applications [7]. Metamaterials are promising in improving the EM characteristics to a great extent from their chemical compositions by artificially designing novel structures at subwavelength scale [9–15]. In the past decade, the control of polarization states of the EM waves with planar metamaterials [7–9] has been a hot spot in the study of functional metamaterials.
A reflective metamaterial polarization transformer (RMPT) is proposed with closed fish-scale structure for high efficient cross-polarization reflection. The maximum efficiency of cross-polarization reflection for normal incidence is 97.2%. The RMPT maintains good performance for incident angles up to 25°, and the RMPT is not restricted to a specific polarization state of the incident wave. Furthermore, the designed RMPT shows excellent structural tunability by optimizing the structural parameters, which makes it user-friendly.
Effects of split ring resonator (SRR) metamaterial on the radiation pattern and variation of the heating focus point of the microstrip patch antenna
2020, Advances in Science, Technology and Engineering Systems
Effect of square srr structure on the radiation pattern of the patch antenna in the x-band
2019, 2019 IEEE 5th Conference on Knowledge Based Engineering and Innovation, KBEI 2019
Plasma-enhanced metamaterials using microwave radiative power transfer
2018, Plasma Sources Science and Technology

View all citing articles on Scopus

View full text

Distribution of THz electric field in the split-ring resonator metamaterials based on the thin film geometry

Highlights

Abstract

Section snippets

Conclusions

Acknowledgments

Science

Opt. Commun.

Curr. Appl. Phys. Lett.

Phys. Rev. Lett.

Science

Science

Science

Nat. Mater.

Opt. Express

Nat. Phot.

Nature