scholarly journals A compact structure for realizing Lorentzian, Fano, and electromagnetically induced transparency resonance lineshapes in a microring resonator

Nanophotonics ◽  
2019 ◽  
Vol 8 (5) ◽  
pp. 841-848 ◽  
Author(s):  
Linpeng Gu ◽  
Hanlin Fang ◽  
Juntao Li ◽  
Liang Fang ◽  
Soo Jin Chua ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Electromagnetically Induced Transparency ◽  
Free Spectral Range ◽  
Microring Resonator ◽  
Quality Factors ◽  
Compact Structure ◽  
Fundamental Building Block ◽  
Resonant Modes ◽  
Fabry Perot ◽  
Induced Transparency

AbstractMicroring resonators, as a fundamental building block of photonic integrated circuits, are well developed into numerous functional devices, whose performances are strongly determined by microring’s resonance lineshapes. We propose a compact structure to reliably realize Lorentzian, Fano, and electromagnetically induced transparency (EIT) resonance lineshapes in a microring. By simply inserting two air-holes in the side-coupled waveguide of a microring, a Fabry-Perot (FP) resonance is involved to couple with microring’s resonant modes, showing Lorentzian, Fano, and EIT lineshapes over one free spectral range of the FP resonance. The quality factors, extinction ratios (ERs), and slope rates (SRs) in different lineshapes are discussed. At microring’s specific resonant wavelength, the lineshape could be tuned among these three types by controlling the FP cavity’s length. Experiment results verify the theoretical analysis well and represent Fano lineshapes with ERs of about 20 dB and SRs over 280 dB/nm. The reliably and flexibly tunable lineshapes in the compact structure have potentials to improve microring-based devices and expand their application scopes.

Numerical analysis of effective refractive index bio-sensor based on graphene-embedded slot-based dual-micro-ring resonator

2020 ◽  
Vol 34 (17) ◽  
pp. 2050145
Author(s):  
C. Y. Zhao ◽  
P. Y. Chen ◽  
P. Y. Li ◽  
C. M. Zhang
Keyword(s):  
Electromagnetically Induced Transparency ◽  
Extinction Ratio ◽  
Fdtd Method ◽  
Ring Resonators ◽  
Compact Structure ◽  
Coupled Mode ◽  
Mode Field ◽  
Sensor Structure ◽  
On Chip ◽  
Induced Transparency

We propose a novel bio-sensor structure composed of slot dual-micro-ring resonators and mono-layer graphene. Based on the electromagnetically induced transparency (EIT)-like phenomenon and the light-absorption characteristics of graphene, we present a theoretical analysis of transmission by using the coupled mode theory and Kubo formula. The results demonstrate the EIT-like spectrum with asymmetric line profile. The mode-field distributions of transmission spectrum are obtained from 3D simulations based on finite-difference time-domain (FDTD) method. Our bio-sensor exhibits theoretical sensitivity of 330 nm/RIU, a minimum detection limit of [Formula: see text] RIU, the maximum extinction ratio of 4.4 dB, the quality factor of [Formula: see text] and a compact structure of [Formula: see text]. Finally, the bio-sensor’s performance is simulated for glucose solution. Our proposed design provides a promising candidate for on-chip integration with other silicon photonic element.

Plasmonic analog of electromagnetically-induced transparency of asymmetrical slots waveguide

2016 ◽  
Vol 30 (05) ◽  
pp. 1650045 ◽  
Author(s):  
Lin Sun ◽  
Jicheng Wang ◽  
Zheng-Da Hu ◽  
Xiaosai Wang ◽  
Jing Chen
Keyword(s):  
Electromagnetically Induced Transparency ◽  
Optical Switch ◽  
Optical Computing ◽  
Geometrical Parameters ◽  
Plasmonic Waveguides ◽  
Metal Insulator Metal ◽  
Fabry Perot ◽  
Line Theory ◽  
Formation And Evolution ◽  
Induced Transparency

In this paper, electromagnetically-induced transparency (EIT) phenomena have been investigated numerically in the plasmonic waveguides composed of unsymmetrical slot shaped metal–insulator–metal (MIM) structures. By the transmission line theory and Fabry–Perot model, the formation and evolution mechanisms of plasmon-induced transparency were exactly analyzed. The analysis showed that the peak of EIT-like transmission could be changed easily according to certain rules by adjusting the geometrical parameters of the slot structures, including the coupling distances and slot depths. We can find a new method to design nanoscale optical switch, devices in optical storage and optical computing.

scholarly journals Switchable Electromagnetically Induced Transparency with Toroidal Mode in a Graphene-Loaded All-Dielectric Metasurface

Nanomaterials ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 1064 ◽  
Author(s):  
Guanghou Sun ◽  
Sheng Peng ◽  
Xuejin Zhang ◽  
Yongyuan Zhu
Keyword(s):  
Electromagnetically Induced Transparency ◽  
Modulation Depth ◽  
Optical Filters ◽  
Destructive Interference ◽  
Quality Factors ◽  
High Q ◽  
Dipole Resonance ◽  
Q Factors ◽  
Induced Transparency ◽  
Dielectric Metasurface

Active photonics based on graphene has attracted wide attention for developing tunable and compact optical devices with excellent performances. In this paper, the dynamic manipulation of electromagnetically induced transparency (EIT) with high quality factors (Q-factors) is realized in the optical telecommunication range via the graphene-loaded all-dielectric metasurface. The all-dielectric metasurface is composed of split Si nanocuboids, and high Q-factor EIT resonance stems from the destructive interference between the toroidal dipole resonance and the magnetic dipole resonance. As graphene is integrated on the all-dielectric metasurface, the modulation of the EIT window is realized by tuning the Fermi level of graphene, engendering an appreciable modulation depth of 88%. Moreover, the group velocity can be tuned from c/1120 to c/3390. Our proposed metasurface has the potential for optical filters, modulators, and switches.

scholarly journals Erratum: Demonstration of resonant phenomena analogous to Autler-Townes splitting, electromagnetically induced transparency and Fano resonances in a deformed waveguide resonator

2021 ◽  
Vol 45 (1) ◽  
pp. 45-47
Author(s):  
A.V. Dyshlyuk
Keyword(s):  
Electromagnetically Induced Transparency ◽  
Transmission Spectra ◽  
Fano Resonances ◽  
Transmitted Power ◽  
Waveguide Resonator ◽  
Reflection And Transmission ◽  
Input And Output ◽  
Fabry Perot ◽  
Before And After ◽  
Induced Transparency

In this erratum to the original paper [1] we correct an error in the calculation of the reflection and transmission spectra of the bent waveguide-based Fabry-Perot resonator. The error resulted from the neglect of cladding modes in the straight input and output sections before and after the resonator under study (Fig. 2a in the original paper). Although these modes do not contribute directly to the calculated reflected and transmitted power carried by the fundamental modes in the input and output sections, they must be taken into account for the correct computation of the reflection and transmission spectra of the resonator as was found out after the original paper had been published. In this erratum we provide the amended results as well as some corrections to the conclusions of the original paper.

scholarly journals Experimental study of EIT-Like phenomenon in a metamaterial plasma waveguide

2012 ◽  
Vol 1 (3) ◽  
pp. 61
Author(s):  
W. Wang ◽  
L. Zhang ◽  
K. Fang ◽  
Y. W. Zhang
Keyword(s):  
Transmission Lines ◽  
Electromagnetically Induced Transparency ◽  
Resonance Wavelength ◽  
Plasma Waveguide ◽  
Destructive Interference ◽  
Microwave Frequencies ◽  
Resonance Modes ◽  
Single Side ◽  
Fabry Perot ◽  
Induced Transparency

This paper demonstrates the realization of the electromagnetically induced transparency (EIT)-like transmission in a metamaterial plasma waveguide with double side defects based on transmission lines. The waveguide with a single side defect works as a plasma resonator and the resonance wavelength is determined by the Fabry-Perot resonance of surface plasma. While in a waveguide with double side defects, a transmission peak appears between the two resonators frequencies because of the destructive interference between the resonance modes of the two resonators, which indicates a pronounced EIT phenomenon. The experiment results agree well with simulations in microwave frequencies.

scholarly journals Analog of multiple electromagnetically induced transparency using double-layered metasurfaces

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Siyuan Liu ◽  
Zhixia Xu ◽  
Xiaoxing Yin ◽  
Hongxin Zhao
Keyword(s):  
Electromagnetically Induced Transparency ◽  
Near Field ◽  
Localized Surface Plasmons ◽  
Dark Mode ◽  
Field Coupling ◽  
Double Peaks ◽  
Resonant Modes ◽  
Physical Essence ◽  
Induced Transparency ◽  
Mode A

Abstract We reported an analog of electromagnetically induced transparency (A-EIT) featured by double transparent peaks in the spectrum. The A-EIT is realized by double-layered metasurface which consists of spoof localized surface plasmons (S-LSP) and cut-wire (CW)-square rings (SR) hybrid. Electric and magnetic S-LSP are excited as bright and dark modes respectively then couple with resonant modes of CW and SR simultaneously to achieve multiple A-EIT. Two bright modes of the electric S-LSP and SR are excited by external electric field directly that produce a bright-bright mode A-EIT. Moreover, the magnetic S-LSP, which cannot be excited by external field directly, is excited through near field coupling from CW, inducing another bright-dark mode A-EIT. Theoretical analysis with corresponding experiment in microwave band are introduced for better insights into physical essence of the double-peaks A-EIT.

Graphene-based electromagnetically induced transparency with coupling Fabry–Perot resonators

2015 ◽  
Vol 54 (24) ◽  
pp. 7455 ◽  
Author(s):  
Huawei Zhuang ◽  
Fanmin Kong ◽  
Kang Li ◽  
Shiwei Sheng
Keyword(s):  
Electromagnetically Induced Transparency ◽  
Fabry Perot ◽  
Induced Transparency
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