Modes simulation and numerical optimization of encapsulated connecting-layer grating for high efficiency

2018 ◽  
Vol 32 (31) ◽  
pp. 1850386 ◽  
Author(s):  
Chenhao Gao ◽  
Bo Wang ◽  
Hongtao Li ◽  
Kunhua Wen ◽  
Ziming Meng ◽  
...  
Keyword(s):  
Numerical Optimization ◽  
High Efficiency ◽  
Photonic Devices ◽  
The Novel ◽  
Wave Analysis ◽  
Rigorous Coupled Wave Analysis ◽  
Rigorous Coupled Wave ◽  
Polarization Independent ◽  
Modal Method ◽  
Coupled Wave

We propose and investigate a polarization-independent high-efficiency encapsulated subwavelength grating with a connecting layer in this paper. Numerical simulated method of rigorous coupled-wave analysis is adopted for optimization. Based on the simulated precise results, a simplified modal method is used to give perspicuous physical propagating fundamentals and explain wideband performance in the grating, where the coupled efficiencies by means of the simplified modal method are to be in conformity with the calculated values of the rigorous coupled-wave analysis for TE and TM polarizations. Compared with the researched surface-relief polarization-independent single-port grating, efficiencies are improved with 98.1% for TE polarization and 98.2% for TM polarization. Hence, the novel gratings with some superiorities are suitable for promising photonic devices.

Design of High-Efficiency Diffraction Gratings Based on Rigorous Coupled-Wave Analysis for 800 nm Wavelength

2008 ◽  
Vol 25 (5) ◽  
pp. 1684-1686 ◽  
Author(s):  
Kong Wei-Jin ◽  
Yun Mao-Jin ◽  
Liu Shi-Jie ◽  
Jin Yun-Xia ◽  
Fan Zheng-Xiu ◽  
...  
Keyword(s):  
High Efficiency ◽  
Diffraction Gratings ◽  
Wave Analysis ◽  
Rigorous Coupled Wave Analysis ◽  
Rigorous Coupled Wave ◽  
Coupled Wave

Reflection performance research of grating with polarization independence based on a sandwiched structure

2018 ◽  
Vol 32 (04) ◽  
pp. 1850042
Author(s):  
Hao Pei ◽  
Bo Wang ◽  
Wenhua Zhu ◽  
Sufang Yin ◽  
Li Chen ◽  
...  
Keyword(s):  
High Efficiency ◽  
Optical Element ◽  
The Novel ◽  
First Order ◽  
Rigorous Coupled Wave Analysis ◽  
Rigorous Coupled Wave ◽  
Sandwiched Structure ◽  
The Given ◽  
Performance Research ◽  
Modal Method

The novel reflective grating was studied under Littrow incidence as one sort of high-efficiency optical element. A covering layer and a dielectric layer are employed in this structure to achieve higher efficiency and wider bandwidth. For the given wavelength of 1550 nm, by using two-beam-interference theory of modal method, duty cycle and period of grating can be calculated, where the physical essence of high efficiency in the first-order is well explained by the modal method. The other grating parameters are optimized by using rigorous coupled-wave analysis. The optimized grating has an appropriate aspect ratio and shows that diffraction efficiencies of TE and TM polarizations in the first-order are greater than 97%. Compared with the reported surface-relief high-efficiency grating, the diffraction efficiencies of the proposed grating for TE and TM polarizations can be greatly improved.

Rigorous Coupled Wave Analysis of Surface Plasmon Resonance Sensor Based on Metallic Grating

2011 ◽  
Vol 211-212 ◽  
pp. 465-468
Author(s):  
De Wei Chen
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Diffraction Order ◽  
Wave Analysis ◽  
Metallic Grating ◽  
Rigorous Coupled Wave Analysis ◽  
Resonance Sensor ◽  
Rigorous Coupled Wave ◽  
Coupled Wave

Since the development almost a decade ago of the first biosensor based on surface plasmon resonance (SPR), the use of this technique has increased steadily. In this study, we theoretically investigated the sensing character of SPR sensor with reflection type metallic with Rigorous Coupled Wave Analysis (RCWA) method, and the mechanism is analyzed by the field distribution. It is found that the sensitivity of negative diffraction order, which goes higher quickly as the resonant angle increases, is much greater than that of positive diffraction order.

Study of Top Triangular Nano-Grating on Solar Cell Using Rigorous Coupled Wave Analysis

2012 ◽  
Vol 571 ◽  
pp. 427-432 ◽  
Author(s):  
Xiao Min Jin ◽  
Douglas Alan Cattarusa ◽  
Michael James Marshall
Keyword(s):  
Solar Cell ◽  
Wave Analysis ◽  
Total Transmission ◽  
Rigorous Coupled Wave Analysis ◽  
Simulation Results ◽  
Rigorous Coupled Wave ◽  
Coupled Wave

This paper presents the simulation results of top nano-grating on solar cell using rigorous coupled wave analysis (RCWA) method. However, compared to other simulation results, we calculated weighted total transmission of solar cell according to Sun spectrum and Silicon photo detector responsivity. Our optimization shows that the top grating with period 200nm, width 40nm, and height 150nm is the optimization structure. This case has 0.45544 total weighted transmission powers and is about 70.9% improvement compared to the non-grating case.

SURFACE-RELIEF THREE-PORT OUTPUT WITH A CONNECTING LAYER GRATING UNDER THE SECOND BRAGG CONDITION

2019 ◽  
Vol 26 (02) ◽  
pp. 1850140 ◽  
Author(s):  
BO WANG ◽  
WENHUA ZHU ◽  
HONGTAO LI ◽  
SUFANG YIN ◽  
CHENGYUE SU ◽  
...  
Keyword(s):  
Surface Relief ◽  
Polarized Light ◽  
Grating Period ◽  
Fused Silica ◽  
The Novel ◽  
Bragg Condition ◽  
Rigorous Coupled Wave Analysis ◽  
Different Depths ◽  
Rigorous Coupled Wave ◽  
Modal Method

A three-port surface-relief grating with a connecting layer under the second Bragg condition is put forward and designed for the free space application in this paper. Such grating can function as a beam splitter, which can split the polarized light into the [Formula: see text]2nd order and the [Formula: see text]1st order and the 0th order based on the optimum grating profile parameters. By using rigorous coupled-wave analysis, a highly-efficient polarization-dependent connecting-layer-based grating can be obtained with the optimum different depths and thicknesses with the grating duty cycle of 0.65 and grating period of 1150[Formula: see text]nm. On the basis of the designed grating profile parameters, a modal method can explain the propagating process. Compared with the conventional surface-relief fused-silica grating, the diffraction efficiencies for TE polarization in three orders are improved. Therefore, the novel conception of the grating under the second Bragg condition is significant for further applications such as interferometer with improved efficiency for TE polarization.

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