scholarly journals Design and Analysis of a Slot Photonic Crystal Waveguide for Highly Sensitive Evanescent Field Absorption Sensing in Fluids

Micromachines ◽  
2020 ◽  
Vol 11 (8) ◽  
pp. 781
Author(s):  
Reyhaneh Jannesari ◽  
Gerald Pühringer ◽  
Thomas Grille ◽  
Bernhard Jakoby
Keyword(s):  
Photonic Crystal ◽  
Evanescent Field ◽  
Slab Thickness ◽  
Photonic Crystal Waveguide ◽  
Dielectric Slab ◽  
Plane Wave Expansion ◽  
Highly Sensitive ◽  
Center Position ◽  
Sensitive Sensor ◽  
Difference Time

The design and modeling of a highly sensitive sensor based on a slot photonic crystal waveguide (slot-PCWG) is presented. The structure consists of cylindrical air rods drilled in a dielectric slab on a triangular lattice, which are filled with SiO2. The waveguide is formed by removing elements from the regular photonic crystal grid in a row, and embedding a slot in the center position. This concept allows for a vast enhancement of the evanescent field ratio, leading to a strong overlap between the field of the waveguide mode and the analyte. In the present work, we show that the sensitivity at the constant slab thickness of the slot-PCWG modes is greatly enhanced, up to a factor of 7.6 compared with the corresponding PCWG modes or Si-slab WGs. The finite-difference time-domain (FDTD) technique and plane wave expansion (PWE) methods were used to study the dispersion and profile of the PCWG mode. The simulation results show the potential of this design, which will be fabricated and tested in the following steps of the project.

Simulation of Broadband Transmission Photonic Crystal Waveguide Crossing with Linear Taper

2013 ◽  
Vol 479-480 ◽  
pp. 133-136
Author(s):  
Yih Bin Lin ◽  
Rei Shin Chen ◽  
Ting Chung Yu ◽  
Ju Feng Liu
Keyword(s):  
Photonic Crystal ◽  
Finite Difference ◽  
Cross Talk ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
Transmission Band ◽  
Time Domain Method ◽  
Photonic Crystal Waveguide ◽  
Difference Time ◽  
Novel Design

A novel design of photonic crystal waveguide crossing with taper structure is proposed. Simulations are performed by finite-difference time-domain method. The results show the proposed design has both high transmission and low cross talk characteristics. The transmission band and low cross talk band can be tuned to match each other by adjusting the taper structure..

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.

Design and Fabrication of Novel Photonic Crystal Waveguide Consisting of Si-Ion Implanted SiO2 Layers

2010 ◽  
Vol 459 ◽  
pp. 168-172 ◽  
Author(s):  
Amarachukwu Valentine Umenyi ◽  
Masashi Honmi ◽  
Shinya Kawashiri ◽  
Teruyoshi Shinagawa ◽  
Kenta Miura ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Fdtd Method ◽  
Design Parameters ◽  
Photonic Crystal Waveguide ◽  
Atomic Force ◽  
Telecommunication Wavelength ◽  
Two Dimensional Photonic Crystal ◽  
Difference Time ◽  
Si Ion Implantation ◽  
Ion Implanted

In this paper, we designed and fabricated two-dimensional photonic crystal (2-D PhC) consisting of the silicon ion (Si-ion) implanted silicon dioxide (SiO2) layers. The PhC design parameters based on the telecommunication wavelength (λ=1.55 µm) were obtained using finite-difference time-domain (FDTD) method. By analyzing the samples fabricated using different fabrication approach; we found a suitable fabrication method for 2-D PhCs based on the Si-ion implanted SiO2 layers. We have analyzed the fabricated sample using atomic force microscope (AFM) and annealing temperature and time were optimized in order to recover the damage done by Si-ion implantation. The implantation of Si-ion into SiO2 with the process of 2-D PhCs structure can effectively guide light inside such structure, which can easily be integrated into the existing silicon technology for directing light from one part of the chip to the other.

scholarly journals All optical binary ASK demodulator using photonic crystal based nonlinear ring resonator

2020 ◽  
Vol 50 (1) ◽  
Author(s):  
Mahsa Narimanzadeh ◽  
Alireza Andalib
Keyword(s):  
Photonic Crystal ◽  
Ring Resonator ◽  
Optical Intensity ◽  
Plane Wave Expansion ◽  
Working Mechanism ◽  
All Optical ◽  
Shift Keying ◽  
Simulation Results ◽  
Optical Behavior ◽  
Difference Time

In this paper we will propose and design an all optical amplitude shift keying demodulator using a photonic crystal based nonlinear ring resonator. The proposed structure will be designed such that it can generate digital 0 and 1 based on the amplitude of the input signal. The working mechanism is based on controlling the optical behavior of the resonant ring using optical intensity. The proposed structure was simulated using plane wave expansion and finite difference time domain methods. The simulation results show that the rise and fall times for the proposed structure are 0.5 and 0.1 ps, respectively.

Design Two Dimensional Nanocavity Photonic Crystal Biosensor Detection in Malaria

2018 ◽  
Vol 6 (6) ◽  
pp. 16 ◽  
Author(s):  
Varsha Sharma ◽  
Vijay Laxmi Kalyani
Keyword(s):  
Photonic Crystal ◽  
Blood Cell ◽  
Red Blood Cell ◽  
Fdtd Method ◽  
Expansion Method ◽  
Two Dimensional ◽  
Plane Wave Expansion ◽  
Plane Wave Expansion Method ◽  
Output Terminal ◽  
Difference Time

In this paper we design a two dimensional (2-D) photonic crystal based biosensor implemented by linear waveguide and nanocavity detection in malaria. The bio molecules such as a red blood cell, infected red blood cell, trapped inside the nanocavity cause transmission shift at the output terminal.  The sensing mechanism of biosensor is change in refractive index of analytes. The layout biosensor is consists a linear waveguide with a nanocavity in square symmetry For the proposed photonic based biosensor, the band gap from 2210nm to 1420 nm and input wavelength of 1550nm are used in this design. The simulation results have analysed by using the finite difference time domain (FDTD) method, bandgap calculation is performed using plane wave expansion method.

Photonic Crystal Cavity with L3-Defect for Resonant Optical Filtering

Frequenz ◽  
2014 ◽  
Vol 68 (11-12) ◽  
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

Analysis of Effective Numerical Aperture in 2-D Photonic Crystal Waveguide

2014 ◽  
Vol 979 ◽  
pp. 455-458
Author(s):  
T. Chantakit ◽  
S. Kamoldilok ◽  
K. Srinuanjan ◽  
P.P. Yupapin
Keyword(s):  
Photonic Crystal ◽  
Fiber Optics ◽  
Numerical Aperture ◽  
Two Dimensional ◽  
Photonic Crystal Waveguide ◽  
Incident Wavelength ◽  
Dimensional Photonic Crystal ◽  
Near Future ◽  
Two Dimensional Photonic Crystal ◽  
Difference Time

The effective numerical aperture calculation in two-dimensional Photonic crystal waveguide has been proposed. In this paper we present the analysis of ray optics refracted inside nanorods and at the boundaries between rods, which separates rod gap is much smaller than the incident wavelength assumed to reflect on the region. In operation, the resolving numerical aperture was compared with the finite difference time domain method via OptiFDTD software. Although numerical aperture mentioned above was found to be extremely close to fiber optics, a transmission passes though compartments of the rods are observed due to significant estimation of transmission and reflection of electric field. The compared simulation results will be discussed. By the aforementioned is that in the near future we will modify wave equation in periodic media of waveguide structures reached to the transverse electric equation of beam propagation in the two-dimensional Photonic crystal waveguide analysed.

scholarly journals Slow light in photonic crystals waveguides

2013 ◽  
Vol 23 ◽  
pp. 27-30
Author(s):  
G. López-Galmiche ◽  
A. Vázquez-Guardado ◽  
I. De León ◽  
J. J. Sánchez-Mondragón
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystals ◽  
Plane Wave ◽  
Slow Light ◽  
Expansion Method ◽  
Photonic Crystal Waveguide ◽  
Plane Wave Expansion ◽  
Plane Wave Expansion Method ◽  
Wave Expansion

We analyzed the scattering produced by technological imperfections in a strip photonic crystal waveguide. Modeling and losses analysis of the slow light structures were carried out by plane wave expansion method using the MPB software.

Resonant Microcavities Coupled to a Photonic Crystal Waveguide for Multi-channel Biodetection

2009 ◽  
Vol 1191 ◽  
Author(s):  
Elisa Guillermain ◽  
Philippe M. Fauchet
Keyword(s):  
Photonic Crystal ◽  
Food Safety ◽  
Transmission Spectrum ◽  
Channel Structure ◽  
Photonic Crystal Waveguide ◽  
Label Free ◽  
Highly Sensitive ◽  
Fabrication And Characterization ◽  
Double Channel

AbstractMiniaturized and highly sensitive bio-sensors are attractive in various applications, such as medicine or food safety. Photonic crystal (PhC) microcavities present multiple advantages for rapid and accurate label-free optical detection. But their principle of operation (i.e. observation of a peak in transmission) makes their integration in serial arrays difficult. We present in this paper a multi-channel sensor consisting of several resonant PhC microcavities coupled to the same waveguide. The transmission spectrum shows as many dips as there are cavities, and each of the microcavities can act as an independent sensor. Preliminary results show the fabrication and characterization of a double-channel structure with small defects used as a solvent sensor.

An Optical Power Divider Based on Two-dimensional Photonic Crystal Structure

2017 ◽  
Vol 38 (2) ◽  
Author(s):  
Nazanin Mesri ◽  
Hamed Alipour-Banaei
Keyword(s):  
Photonic Crystal ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
Optical Power ◽  
Power Divider ◽  
Two Dimensional ◽  
Plane Wave Expansion ◽  
Dimensional Photonic Crystal ◽  
Two Dimensional Photonic Crystal ◽  
Difference Time

AbstractIn this paper, an optical power divider with one input and four outputs has been proposed in a two-dimensional photonic crystal with triangular lattice and simulated using dielectric holes in an air substrate. The dividing properties of the power divider have been numerically simulated and analyzed using the plane wave expansion and finite difference time domain methods. The results show that the transmittance of this divider can be as high as 94.22 % for

Sign in / Sign up

Export Citation Format

Share Document