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

Investigation on Two-Dimensional Photonic Crystal Self-Collimation Splitting Sensor

2010 ◽  
Vol 428-429 ◽  
pp. 367-371
Author(s):  
Yu Fei Wang ◽  
Guo Zhong Lai ◽  
Jian Feng Zhang ◽  
Fu Zhong Lin ◽  
Xiong Liang ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
Two Dimensional ◽  
Trade Off ◽  
Optical Detector ◽  
Reflected Light ◽  
Calculation Results ◽  
Two Dimensional Photonic Crystal ◽  
Difference Time

A self-collimation splitting sensor truncated in a two-dimensional (2D) photonic crystal has been proposed and demonstrated theoretically. Intensity of transmitted light and reflected light, which varies with the width of the splitter, is detected at two output ports. Calculation results validated by the 2D finite-difference time-domain technique show that with the increase of width, the transmittivity decreases while the reflectivity increases and their summation decreases. Considering the trade-off between the sensitivity of the optical detector and the loss of power, including the difficulty of fabrication, the width of 0.4a is meet for the sensor. The simulated relative intensity monotonously increases from 1.63 to 2.94 nonlinearly.

Design of a new two-dimensional optical biosensor using photonic crystal waveguides and a nanocavity

2016 ◽  
Vol 5 (1) ◽  
Author(s):  
Hamideh Mohsenirad ◽  
Saeed Olyaee ◽  
Mahmood Seifouri
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Point Defects ◽  
Finite Difference Time Domain ◽  
Optical Biosensor ◽  
Two Dimensional ◽  
Plane Wave Expansion ◽  
Photonic Crystal Waveguides ◽  
Two Dimensional Photonic Crystal ◽  
Difference Time

AbstractIn this paper, a two-dimensional photonic crystal biosensor for medical applications based on two waveguides and a nanocavity is presented. The waveguides and nanocavity are created by introducing line and point defects into a photonic crystal, respectively. It could be shown that by injecting an analyte into a sensing hole, and thus changing its refractive index, may shift the resonant wavelength. The proposed structure is designed for the wavelength range of 1.5259–1.6934 μm. Sensitivity, the most important biosensor parameter, was studied and found to be approximately equal to 83.75 nm/refractive index units (RIU). An important specification of this structure is its very small dimensions. Two-dimensional finite-difference time domain and plane-wave expansion methods were used for both to simulate the proposed structure and to obtain the band diagrams.

Design and Analysis of Self-Collimation-Based Photonic Crystal Beam Splitter

2014 ◽  
Vol 887-888 ◽  
pp. 417-421
Author(s):  
Hong Jing Li ◽  
Li An Chen
Keyword(s):  
Photonic Crystal ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
Beam Splitter ◽  
Practical Applications ◽  
Beam Splitters ◽  
Output Surface ◽  
Fdtd Simulations ◽  
Two Dimensional Photonic Crystal ◽  
Difference Time

We present a self-collimation-based beam splitter in a two-dimensional photonic crystal (2D-PC) by introducing defects near the termination. From the equi-frequency contour (EFC) calculations and the finite-difference time-domain (FDTD) simulations, we show that the defects can give rise to the splitting of self-collimated beams in 2D-PCs and the directivity of the deflected beam can be improved by the defect along the PC surface. In order to get different kinds of beam splitters, including the Y-shaped, one-to-three, one-to-four structures, and so on, we only need to modify the structure of the output surface (along X-M direction). The proposed splitter may have practical applications in integrated photonic circuits.

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