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Featured researches published by Huilin Zhong.


Journal of Applied Physics | 2015

Acoustic beam splitting in two-dimensional phononic crystals using self-collimation effect

Jing Li; Fugen Wu; Huilin Zhong; Yuanwei Yao; Xin Zhang

We propose two models of self-collimation-based beam splitters in phononic crystals. The finite element method is used to investigate the propagation properties of acoustic waves in two-dimensional phononic crystals. The calculated results show that the efficiency of the beam splitter can be controlled systematically by varying the radius of the rods or by changing the orientation of the square rods in the line defect. The effect of changing the side length of the square rods on acoustic wave propagation is discussed. The results show that the total transmission/reflection range decreases/increases as the side length increases. We also find that the relationship between the orientation of the transflective point and the side length of the square rods is quasi-linear.


Journal of Physics D | 2010

Effects of asymmetrical rotated rectangular basis on the acoustic band gap in two-dimensional acoustic crystals: the bands are twisted

Huafeng Dong; Fugen Wu; Huilin Zhong; Xin Zhang; Yuanwei Yao

The band structure and the change in band extremas position during the rotation of bases are analysed in two-dimensional rectangular-basis acoustic crystals (ACs) with a square lattice. We find that the bands of ACs are twisted and some of the extrema of the bands move anticlockwise or clockwise in the whole area of the first Brillouin zone (BZ) when the bases are rotated clockwise. These make the irreducible BZ expand into the whole first BZ. Therefore, for the ACs with a rectangular basis or similar kind of basis, it is important to study the whole first BZ to obtain the accurate band structure.


Modern Physics Letters B | 2014

Tuning the acoustic directional radiation by rotating square rods in two-dimensional phononic crystals

Jing Li; Fugen Wu; Huilin Zhong; Xin Zhang; Yuanwei Yao

Analysis is given to acoustic directional radiation tuned by rotating square rods in two-dimensional (2D) solid–fluid phononic crystals (PC). The contour line method is introduced which predicts how the acoustic waves propagate at different frequency. As a specific example, for the systems of steel rods with square cross-section in a water host, we employ this approach to the analysis of the directivity successfully. The directional radiation frequency of two lowest bands are studied in this paper. The results show that the directional radiation frequency can be turned in a wide range by rotating the square rods. While the directivity of acoustic propagation keeps unchanged when the acoustic directional radiation frequency is located in the same band. Moreover, PCs exhibit excellent characteristic of single radiation branch as a corner cut off in a finite structure. Our approach may supply a new way to tune the directional radiation frequency.


Modern Physics Letters B | 2013

METHOD OF TUNING FREQUENCY OF THE DEFECT MODE IN TWO-DIMENSIONAL SQUARE PHOTONIC CRYSTALS

Shuya Yan; Fugen Wu; Xin Zhang; Yuanwei Yao; Huilin Zhong; Yun He; Cong Cheng

In this paper, we investigate the defect modes created by taking a single rod away from the center of the supercell in two-dimensional photonic crystals. Through theoretical calculation, we find that the defect band can exist in the photonic band gaps, and the position of the defect band frequency intensively depends on the position and radius size of the defect rod. When the radius of the defect rod is bigger than that of the normal rods, the frequency of the defect band can be tunable in a wider range by moving the defect position while the doubly degenerate defect modes may split into two nondegenerate defect modes. The investigation provides a theoretical instruction to design the optical resonator with tunable frequency.


Modern Physics Letters B | 2012

ENHANCEMENT OF LIGHT EXTRACTING FROM GaN-BASED BLUE LIGHT EMITTING DIODES USING PHOTONIC CRYSTAL

Yan Wang; Fugen Wu; Xin Zhang; Yuanwei Yao; Huilin Zhong; Shuya Yan; Yun He

Photonic crystal (PC) structures on LED have been known to enhance the light extraction significantly. In this paper, we report the light energy of GaN-based blue lighting emitting diode (LED) with perfect area photonic crystal (PPC) structure and defect area photonic crystal (DPC) structure. As a result, the light extracting energy of LEDs with PPC structure enhanced little compared to that of without PC structure. In addition, the light extracting energy of blue LED with DPC structure was remarkably improved.


Journal of Physics D | 2006

Extreme acoustic band gaps obtained under high symmetry in 2D phononic crystals

Ren Min; Fugen Wu; Lanhua Zhong; Huilin Zhong; Shao Zhong; Youyan Liu


Physics Letters A | 2005

Effects of orientation and symmetry of rods on the complete acoustic band gap in two-dimensional periodic solid/gas systems

Lanhua Zhong; Fugen Wu; Xin Zhang; Huilin Zhong; Shao Zhong


European Physical Journal B | 2003

Localized states of acoustic waves in three-dimensional periodic composites with point defects

Fugen Wu; Huilin Zhong; Shao Zhong; Zhengyou Liu; Youyan Liu


Physics Letters A | 2006

Large band gaps of water waves through two-dimensional periodic topography

Shaohua Yang; Fugen Wu; Huilin Zhong; Lanhua Zhong


Physics Letters A | 2005

Localized defect modes of water waves through two-dimensional periodic bottoms with point defects

Huilin Zhong; Fugen Wu; Xin Zhang; Youyan Liu

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Fugen Wu

Guangdong University of Technology

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Xin Zhang

Guangdong University of Technology

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Yuanwei Yao

Guangdong University of Technology

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Lanhua Zhong

Guangdong University of Technology

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Shao Zhong

Guangdong University of Technology

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Youyan Liu

South China University of Technology

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Jing Li

Guangdong University of Technology

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Shuya Yan

Guangdong University of Technology

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Yun He

Guangdong University of Technology

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Cong Cheng

Guangdong University of Technology

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