Tapered Couplers for Group-Velocity insensitive coupling to Photonic Crystal Waveguide Modes

2008 ◽  
Author(s):  
M. Askari ◽  
B. Momeni ◽  
A. Adibi
Keyword(s):  
Photonic Crystal ◽  
Group Velocity ◽  
Photonic Crystal Waveguide ◽  
Waveguide Modes

scholarly journals High Figure of Merit Optical Buffering in Coupled-Slot Slab Photonic Crystal Waveguide with Ionic Liquid

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1742
Author(s):  
Israa Abood ◽  
Sayed Elshahat ◽  
Zhengbiao Ouyang
Keyword(s):  
Ionic Liquid ◽  
Optical Properties ◽  
Ionic Liquids ◽  
Photonic Crystal ◽  
Group Velocity ◽  
Figure Of Merit ◽  
Transmission Rate ◽  
Flat Band ◽  
Photonic Crystal Waveguide ◽  
The Future

Slow light with adequate low group velocity and wide bandwidth with a flat band of the zero-dispersion area were investigated. High buffering capabilities were obtained in a silicon-polymer coupled-slot slab photonic crystal waveguide (SP-CS-SPCW) with infiltrating slots by ionic liquid. A figure of merit (FoM) around 0.663 with the lowest physical bit length Lbit of 4.6748 µm for each stored bit in the optical communication waveband was gained by appropriately modifying the square air slot length. Posteriorly, by filling the slots with ionic liquid, the Lbit was enhanced to be 4.2817 μm with the highest FoM of 0.72402 in wider transmission bandwidth and ultra-high bit rate in terabit range, which may become useful for the future 6G mobile communication network. Ionic liquids have had a noticeable effect in altering the optical properties of photonic crystals. A polymer was used for the future incorporation of an electro-optic effect in buffers to realize the dynamic controlling of optical properties. Ionic liquids enhanced the transmission rate through optical materials. Additionally, the delay time in the ns-range was achieved, providing longer delay and ultra-low group velocity, which is important for light-matter interaction in light amplifiers and nonlinear devices.

Characteristics of Slow Light in a Photonic Crystal Coupled-Cavity Waveguide

2014 ◽  
Vol 887-888 ◽  
pp. 437-441
Author(s):  
Chang Xin Zhang ◽  
Xing Sheng Xu ◽  
Wei Xi
Keyword(s):  
Photonic Crystal ◽  
Group Velocity ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
Slow Light ◽  
Fdtd Method ◽  
Photonic Crystal Waveguide ◽  
Difference Time ◽  
Coupled Cavity ◽  
Coupled Cavity Waveguide

A two-dimensional (2D) triangular lattice photonic crystal coupled-cavity waveguide is designed and optimized. The transmission spectrum of the PC waveguide with TE polarization is calculated by using the finite-difference time-domain (FDTD) method, and the group velocity of c/131.18 at the wavelength is obtained. Through optimizing the parameters of photonic crystal waveguide, different resonance length are obtained by changing the number of the continous air holes. The smallest group velocity is obtained to be c/2209 in the coupled-cavity waveguide with 15 air holes. The mechanism of slow light in the coupled-cavity waveguide of photonic crystal is analyzed.

Group velocity independent coupling into slow light photonic crystal waveguide on silicon nanophotonic integrated circuits

2011 ◽  
Author(s):  
Che-Yun Lin ◽  
Xiaolong Wang ◽  
Swapnajit Chakravarty ◽  
Wei-Cheng Lai ◽  
Beom Suk Lee ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Integrated Circuits ◽  
Group Velocity ◽  
Slow Light ◽  
Photonic Crystal Waveguide

scholarly journals Slow Light Tuning in Annular Slotted Photonic Crystal Waveguide with Incoming Polymer

2021 ◽  
Vol 2109 (1) ◽  
pp. 012008
Author(s):  
Konttao Zhu ◽  
Hongxue Yang ◽  
Hui Du
Keyword(s):  
Photonic Crystal ◽  
Group Velocity ◽  
Slow Light ◽  
Transmission Rate ◽  
Group Velocity Dispersion ◽  
Flat Band ◽  
Group Index ◽  
Photonic Crystal Waveguide ◽  
Processing Scheme ◽  
Operating Wavelength

Abstract An advanced post-processing scheme of reconfigurable dielectric infiltration into an annular slotted photonic crystal waveguide (ASPhCW) is proposed in this paper. Ionic liquids have had prominent effects in enhancing the optical properties of photonic crystals, especially in the aspect of tuning the transmission rate and velocity through optical materials. Using the two-dimensional plane wave expansion method, the flat band dispersion of the slow light is obtained and the tuning of the operating wavelength of the crystal could be realized by incoming polymer technology. The operating wavelength tuning range could be as large as 459.27nm and the group index could be tuned as high as 44.8 with a near zero group velocity dispersion. Using this method, a high group index equaling 45 with the bandwidth equaling 11.3nm and the normalized delay bandwidth product (NDBP) equaling 0.25 is realized. This incoming polymer technology provides an effective method of getting flat band of slow light flexibly and makes it possible to offer longer delay and low group velocity after fabrication.

Sign in / Sign up

Export Citation Format

Share Document