scholarly journals Flat-top optical resonance in a single-ring resonator based on manipulation of fast- and slow-light effects

2018 ◽  
Vol 26 (18) ◽  
pp. 23215 ◽  
Author(s):  
Menghao Huang ◽  
Simin Li ◽  
Min Xue ◽  
Lei Zhao ◽  
Shilong Pan
Keyword(s):  
Slow Light ◽  
Ring Resonator ◽  
Optical Resonance ◽  
Single Ring ◽  
Light Effects

Tunable plasmonic-induced transparency based on stub-coupled cascade ring resonator with electro-optical material

2019 ◽  
Vol 33 (18) ◽  
pp. 1950206
Author(s):  
Fang Chen ◽  
Huafeng Zhang ◽  
Lihui Sun ◽  
Jijun Li ◽  
Chunchao Yu
Keyword(s):  
Slow Light ◽  
Ring Resonator ◽  
Optical Switch ◽  
Fdtd Method ◽  
Optical Material ◽  
Ring Resonators ◽  
Refractive Index Sensor ◽  
External Voltage ◽  
All Optical Switch ◽  
Induced Transparency

The electrical control of plasmonic-induced transparency (PIT) via a resonator waveguide system is presented. The proposed structure is composed of a stub and cascade ring resonator. The ring and the stub resonator are filled with electro-optical material which can control the resonance frequency by the external voltage. Two-dimensional finite difference time domain (2D FDTD) method is used to calculate the transmission and field distribution. Single PIT is investigated both by FDTD and Coupled Mode Theory (CMT). The proposed PIT can be tuned by changing the external voltage or the geometric parameters. Double and triple PIT can be obtained by introducing more ring resonators and can be tuned by external voltage. The proposed plasmonic structure may have application in slow light device, nanoscale filter, all-optical switch and refractive index sensor.

Analysis of a second-order polarization-independent filter made of a single ring resonator and a Sagnac interferometer

2006 ◽  
Vol 260 (2) ◽  
pp. 567-570 ◽  
Author(s):  
Fufei Pang ◽  
Feng Liu ◽  
Xiuyou Han ◽  
Haiwen Cai ◽  
Ronghui Qu ◽  
...  
Keyword(s):  
Ring Resonator ◽  
Second Order ◽  
Sagnac Interferometer ◽  
Single Ring ◽  
Polarization Independent

Negative Permeability of Single-ring Split Ring Resonator in the Visible Light Frequency Region

2006 ◽  
Vol 919 ◽  
Author(s):  
Takuo Tanaka ◽  
Atsushi Ishikawa ◽  
Satoshi Kawata
Keyword(s):  
Visible Light ◽  
Magnetic Permeability ◽  
Filling Factor ◽  
Ring Resonator ◽  
Split Ring Resonator ◽  
Frequency Region ◽  
Visible Range ◽  
Split Ring ◽  
Single Ring ◽  
Internal Impedance

AbstractNegative permeability of single-ring split ring resonator (s-SRR) is theoretically investigated in the visible light frequency region [1, 2]. To estimate magnetic responses of conductive elements precisely, we determined internal impedance by considering the delay of the current inside the metal structure. The increase of the surface resistivity, which is the real part of the internal impedance, results in the decrease of the resonator's Q-value. This means the degradation of the tunable range of the permeability. The increase of the internal reactance results in the reduction of the resonant frequency. In our calculation, the surface resistivity saturates at the inherent frequency of each metal as the frequency increases. On the silver case, the saturation value is 0.4 Ω and this value is remarkably smaller than that of gold and copper. On the other hand, the internal reactance is increasing as the frequency increases independently of metal. We concluded that the internal reactance is dominant factor to realize the negative magnetic permeability in the optical frequency region. We also show the frequency dependence of the magnetic permeability of s-SRRs. In the case of s-SRRs made of copper, the minimum value of the magnetic permeability becomes positive value at 550 THz even in the high filling factor condition (11%). In the case of s-SRRs made of gold, only on the filling factor was 11%, the minimum value of the magnetic permeability takes negative value in the entire visible range. On the other hand, the silver SRR exhibits negative magnetic permeability in the visible range even under the low filling factor condition of 3%. Moreover, we concluded that reducing the geometrical capacitance and using silver for SRR are necessary to realize the negative magnetic permeability in the visible light range.

Wideband slow light effects in 25 Gbps Si photonic crystal Mach-Zehnder modulators

2015 ◽  
Author(s):  
Yosuke Hinakura ◽  
Yosuke Terada ◽  
Takuya Tamura ◽  
Toshihiko Baba
Keyword(s):  
Photonic Crystal ◽  
Slow Light ◽  
Light Effects

Silicon coupled-ring resonator structures for slow light applications: potential, impairments and ultimate limits

2010 ◽  
Vol 12 (10) ◽  
pp. 104008 ◽  
Author(s):  
A Canciamilla ◽  
M Torregiani ◽  
C Ferrari ◽  
F Morichetti ◽  
R M De La Rue ◽  
...  
Keyword(s):  
Slow Light ◽  
Ring Resonator
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