Low Loss and High-Quality Factor Optical Filter Using Photonic Crystal-Based Resonant Cavity

Abstract Transmission efficiency and quality factor are two of the most crucial characteristics in designing optical band pass filters. In this paper, we proposed a novel structure for realizing an optical filter. For the wavelength selecting part of the filter, we employed a V-shaped resonant cavity. The obtained filter has a resonant mode at 1313 nm with transmission efficiency and quality factor as much as 97 % and 3548, respectively.

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High Sensitivity And Ultra-High Quality Factor For An All-Optical Temperature Sensor Based On Photonic Crystal Technology

10.21203/rs.3.rs-671551/v1 ◽

2021 ◽

Author(s):

Kouddad Elhachemi ◽

Naoum Rafah ◽

Dekkiche Leila

Keyword(s):

Photonic Crystal ◽

Quality Factor ◽

Temperature Sensor ◽

Resonant Cavity ◽

Fdtd Method ◽

Transmission Efficiency ◽

High Quality Factor ◽

High Quality ◽

Compact Size ◽

Cavity Structure

Abstract In our work, we propose a novel temperature sensor design based on a two-dimensional (2D) photonic crystal resonant cavity structure designed to detect and monitor temperature under very harsh environmental conditions from 0 °C to 500 ºC. The sensitivity of the proposed structure is 109.8 pm/ºC, an ultra-high quality factor, high transmission efficiency and ultra-compact size. The characteristics of the proposed sensor under different temperatures are simulated using the Plane Wave Expansion (PWE) method and Finite Difference Time Domain (FDTD) method to calculate, respectively, the Photonic Band Gap (PBG) and transmission efficiency. The results obtained show that the wavelength of the resonant cavity increases linearly with increasing temperature. Our sensor is suitable for applications based on nanotechnology.

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Highly sensitive fluid sensing due to slow light in pillar-based photonic crystal ring resonators

tm - Technisches Messen ◽

10.1515/teme-2017-0135 ◽

2018 ◽

Vol 85 (7-8) ◽

pp. 515-520

Author(s):

Reyhaneh Jannesari ◽

Thomas Grille ◽

Bernhard Jakoby

Keyword(s):

Photonic Crystal ◽

Quality Factor ◽

Slow Light ◽

Ring Resonator ◽

Resonant Mode ◽

High Quality Factor ◽

Ring Resonators ◽

High Quality ◽

Highly Sensitive ◽

Photonic Crystal Ring Resonator

Abstract A design for a high quality factor photonic crystal ring resonator (PCRR) is presented. The PCRR is based on pillar type photonic crystals, which consist of a hexagonal array of silicon rods. The cavity is created by removing elements from the regular photonic crystal (PhC) grid. Achieving strong confinement of light intensity in the low index region is the advantage of this PCRR. In that manner, the interaction of light and analyte, which can be a liquid or a gas, will be enhanced. The high quality factor of the cavity (Q=1.0229\times {10}^{5}), along with strong overlap between the field of the resonant mode and the analyte as well as the low group velocity of PCRR modes yield enhanced light-matter interaction. An enhancement factor of \gamma =2.127\times {10}^{4} compared to the bulk light absorption in a homogenous material provides the potential for highly sensitive gas detection with a photonic crystal ring resonator.

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Photonic Crystal Cavity with L3-Defect for Resonant Optical Filtering

Frequenz ◽

10.1515/freq-2014-0069 ◽

2014 ◽

Vol 68 (11-12) ◽

Cited By ~ 11

Author(s):

Mahdi Zavvari ◽

Farhad Mehdizadeh

Keyword(s):

Photonic Crystal ◽

Resonant Cavity ◽

Optical Filter ◽

Transmission Efficiency ◽

Plane Wave Expansion ◽

Optical Filtering ◽

Input And Output ◽

The Impact ◽

Difference Time ◽

Novel Design

AbstractA novel design of optical filter based on photonic crystal structure is proposed in this paper. For designing the proposed filter we introduce an L3 resonant cavity between the input and output waveguides. We study the impact of different parameters on the filtering behavior of the structure using plane wave expansion and finite difference time domain methods. The initial form of this filter is capable of selecting the optical waves at λ = 1557.8 nm and the transmission efficiency of the filter is obtained about 84%. The total footprint of the filter is less than 205 μm

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Design of Photonic Crystal-Based Demultiplexer with High-Quality Factor for DWDM Applications

Journal of Optical Communications ◽

10.1515/joc-2017-0058 ◽

2019 ◽

Vol 40 (2) ◽

pp. 135-138 ◽

Cited By ~ 3

Author(s):

Mahdi Zavvari

Keyword(s):

Photonic Crystal ◽

Quality Factor ◽

Transmission Efficiency ◽

High Quality Factor ◽

Selection Task ◽

Wavelength Selection ◽

High Quality ◽

Channel Spacing ◽

Resonant Cavities

Abstract In this article, we proposed a four-channel optical demultiplexer based on photonic crystal resonant cavities. For performing wavelength selection task, we used four resonant cavities with different lengths in order to choose four channels with different wavelengths. The average channel spacing of the structure is about 1 nm and the minimum transmission efficiency is 90 %. The bandwidths of the channels are the same and equal to 0.8 nm.

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

Scientific Reports ◽

10.1038/s41598-021-89410-1 ◽

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.

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