A compact structure for realizing electromagnetically induced transparency in a microring resonator

2020 ◽  
Author(s):  
Fahad Malik ◽  
Muhammad Favad Qadir ◽  
Aftab Hussain ◽  
Muhammad Zakwan ◽  
Waleed Tahir
Keyword(s):  
Electromagnetically Induced Transparency ◽  
Microring Resonator ◽  
Compact Structure ◽  
Induced Transparency

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.

scholarly journals Electromagnetically Induced Transparency (EIT) Like Transmission Based on 3 × 3 Cascaded Multimode Interference Resonators

Micromachines ◽  
2018 ◽  
Vol 9 (8) ◽  
pp. 417 ◽  
Author(s):  
Trung-Thanh Le
Keyword(s):  
Electromagnetically Induced Transparency ◽  
Complementary Metal Oxide Semiconductor ◽  
Microring Resonator ◽  
Oxide Semiconductor ◽  
Design Parameters ◽  
Multimode Interference ◽  
Silicon Waveguide ◽  
Resonance Unit ◽  
Theoretical And Numerical Analysis ◽  
Induced Transparency

We propose a method for generating the electromagnetically induced transparency (EIT) like-transmission by using microring resonator based on cascaded 3 × 3 multimode interference (MMI) structures. Based on the Fano resonance unit created from a 3 × 3 MMI coupler with a feedback waveguide, two schemes of two coupled Fano resonator unit (FRU) are investigated to generate the EIT like transmission. The theoretical and numerical analysis based on the coupled mode theory and transfer matrix is used for the designs. Our proposed structure has advantages of compactness and ease of fabrication. We use silicon waveguide for the design of the whole device so it is compatible with the existing Complementary Metal-Oxide-Semiconductor (CMOS) circuitry foundry. The fabrication tolerance and design parameters are also investigated in this study.

Probing Bloch oscillations using a slow-light sensor

2020 ◽  
Vol 9 (5) ◽  
pp. 243-246
Author(s):  
Pei-Chen Kuan ◽  
Chang Huang ◽  
Shau-Yu Lan
Keyword(s):  
Phase Shift ◽  
Optical Lattice ◽  
Cold Atoms ◽  
Slow Light ◽  
Internal State ◽  
Electromagnetically Induced Transparency ◽  
Bloch Oscillations ◽  
Bloch Oscillation ◽  
Induced Transparency ◽  
Transparency Condition

AbstractWe implement slow-light under electromagnetically induced transparency condition to measure the motion of cold atoms in an optical lattice undergoing Bloch oscillation. The motion of atoms is mapped out through the phase shift of light without perturbing the external and internal state of the atoms. Our results can be used to construct a continuous motional sensor of cold atoms.

scholarly journals Broadband coherent optical memory based on electromagnetically induced transparency

2020 ◽  
Vol 102 (6) ◽  
Author(s):  
Yan-Cheng Wei ◽  
Bo-Han Wu ◽  
Ya-Fen Hsiao ◽  
Pin-Ju Tsai ◽  
Ying-Cheng Chen
Keyword(s):  
Electromagnetically Induced Transparency ◽  
Optical Memory ◽  
Induced Transparency
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