Dual-working mode device based on dual-element photonic crystal-stepped concave waveguide

2021 ◽  
Author(s):  
Zizheng Li ◽  
Jianping Wang ◽  
Hongyao Chen ◽  
Huimin Lu ◽  
Yifan Zhu ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Quality Factor ◽  
Microring Resonator

Abstract In this study, a Si3N4 on insulator device used for photonic integrated chips (PICs) is proposed. The dual-working mode device is constructed using a racetrack microring resonator, which is established using a dual-period photonic crystal-stepped concave waveguide (DPCSCW). A novel scheme of dual-working modes is realized, and sensing and filtering are performed simultaneously without interference. The results show that a sensitivity of 558.6 nm/RIU and quality factor of 5795.24 were obtained for the sensor mode. An extinction of 58 dB and bandwidth of up to 335 nm were achieved in the filter mode. The footprint of the entire device is within 20 μm×11 μm, which is ultra-compact and suitable for PICs.

scholarly journals Global optimization of an encapsulated Si/SiO$$_2$$ L3 cavity with a 43 million quality factor

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
J. P. Vasco ◽  
V. Savona
Keyword(s):  
Global Optimization ◽  
Photonic Crystal ◽  
Quality Factor ◽  
State Of The Art ◽  
Optimization Strategy ◽  
High Quality ◽  
Optimal Value ◽  
Out Of Plane ◽  
Fabrication Tolerances ◽  
Structural Imperfections

AbstractWe optimize a silica-encapsulated silicon L3 photonic crystal cavity for ultra-high quality factor by means of a global optimization strategy, where the closest holes surrounding the cavity are varied to minimize out-of-plane losses. We find an optimal value of $$Q_c=4.33\times 10^7$$ Q c = 4.33 × 10 7 , which is predicted to be in the 2 million regime in presence of structural imperfections compatible with state-of-the-art silicon fabrication tolerances.

scholarly journals Fabricating centimeter-scale high quality factor two-dimensional periodic photonic crystal slabs

2014 ◽  
Vol 22 (3) ◽  
pp. 3724 ◽  
Author(s):  
Jeongwon Lee ◽  
Bo Zhen ◽  
Song-Liang Chua ◽  
Ofer Shapira ◽  
Marin Soljačić
Keyword(s):  
Photonic Crystal ◽  
Quality Factor ◽  
High Quality Factor ◽  
Two Dimensional ◽  
High Quality ◽  
Photonic Crystal Slabs

Experimental quality factor determination of guided-mode resonances in photonic crystal slabs

2008 ◽  
Vol 93 (26) ◽  
pp. 261110 ◽  
Author(s):  
Yousef Nazirizadeh ◽  
Uli Lemmer ◽  
Martina Gerken
Keyword(s):  
Photonic Crystal ◽  
Quality Factor ◽  
Guided Mode ◽  
Photonic Crystal Slabs

Design of slotted high quality factor photonic-crystal nanocavities embedded in electro-optic polymers

2017 ◽  
Vol 56 (9) ◽  
pp. 090304 ◽  
Author(s):  
Masahiro Nakadai ◽  
Ryotaro Konoike ◽  
Yoshinori Tanaka ◽  
Takashi Asano ◽  
Susumu Noda
Keyword(s):  
Photonic Crystal ◽  
Quality Factor ◽  
High Quality Factor ◽  
High Quality ◽  
Electro Optic

A photonic crystal side-coupled waveguide based on a high-quality-factor resonator array

2012 ◽  
Vol 21 (3) ◽  
pp. 034215
Author(s):  
Nai-Di Cui ◽  
Jing-Qiu Liang ◽  
Zhong-Zhu Liang ◽  
Wei-Biao Wang
Keyword(s):  
Photonic Crystal ◽  
Quality Factor ◽  
High Quality Factor ◽  
High Quality

Design of a High-Quality Optical Filter Based on 2D Photonic Crystal Ring Resonator for WDM Systems

2020 ◽  
Vol 41 (4) ◽  
pp. 355-361
Author(s):  
Vahid Fallahi ◽  
Mahmood Seifouri
Keyword(s):  
Photonic Crystal ◽  
Quality Factor ◽  
Transmission Coefficient ◽  
Lattice Constant ◽  
Ring Resonator ◽  
Photonic Band Gap ◽  
Structural Parameters ◽  
Optical Filter ◽  
Expansion Method ◽  
Square Lattice

AbstractIn this article, a 2D photonic crystal (PC)-based optical filter has been designed using a PC ring resonator. The resonator used is of square type with a square lattice constant, which has been designed by increasing the radius of the inner rods of the resonator. The filter designed can separate the light of the wavelength of 1545.3 nm with a transmission coefficient of 98 %. The bandwidth of the above wavelength is equal to 0.5 nm and hence the quality factor of the device at this wavelength is equal to 3091. The effects of the structural parameters, such as the refractive index, the lattice constant, the radius of the dielectric rods, the radius of the inner rods of the resonator on the behavior of the proposed device, are fully investigated. To obtain the photonic band gap, the plane wave expansion method is used. In addition, the finite difference time domain method is used to examine, simulate, and to obtain the output spectrum of the structure. The designed structure has both high transmission coefficient and quality factor. Comparatively speaking, it is also simple to design which justifies its use in other photonic crystal-based optical devices.

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