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

SHUYA YAN

Department of Experiment Education, Guangdong University of Technology, Guangzhou 510006, China

Department of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China

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FUGEN WU

Department of Experiment Education, Guangdong University of Technology, Guangzhou 510006, China

Corresponding author.

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XIN ZHANG

Department of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China

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YUANWEI YAO

Department of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China

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HUILIN ZHONG

Department of Experiment Education, Guangdong University of Technology, Guangzhou 510006, China

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YUN HE

Department of Experiment Education, Guangdong University of Technology, Guangzhou 510006, China

Department of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China

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, and

CONG CHENG

Department of Experiment Education, Guangdong University of Technology, Guangzhou 510006, China

Department of Physics and Optoelectronic Engineering, Guangdong University of Technology, Guangzhou 510006, China

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https://doi.org/10.1142/S0217984913500541Cited by:2 (Source: Crossref)

Abstract

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.

Keywords:

PACS: 42.70.Qs, 42.60.Da

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