### Abstract

(Graph Presented). We theoretically investigate the properties of defect modes in one-dimensional symmetric defective photonic crystals. We consider three defective photonic crystal structures, air/[(AB)^{Ns}A^{α}(BA)^{Ns}]^{Np}/air, air/[(AB)^{Ns}AB^{β}A(BA)^{Ns}]^{Np}/air, and air/{[(AB)^{Ns}AB^{β}A(BA)^{Ns}]B^{γ}}^{Np-1}[(AB)^{Ns}AB^{β}A(BA)^{Ns}]/air, where A and B are respectively taken to be the high- and low-index dielectric materials. The first has a defect layer of A^{α}, the second has a composite defect, AB^{β}A, and the third has a interleaving defect B^{γ}. The effect of thickness on the defect mode is studied by varying the parameters α, β, and γ, respectively, for the above model structures. It is found that the positions and the number of defect modes can be significantly changed due to the change in the defect thickness. In addition, by increasing the repeated number N_{p}, we can have multiple defect modes, leading to a possible design of tunable multichannel filter.

Original language | English |
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Pages (from-to) | 39-46 |

Number of pages | 8 |

Journal | Physica E: Low-Dimensional Systems and Nanostructures |

Volume | 69 |

DOIs | |

Publication status | Published - 2015 Jan 1 |

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### Keywords

- Defect modes
- Photonic bandgaps
- Photonic crystals

### ASJC Scopus subject areas

- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics

### Cite this

**Properties of defect modes in one-dimensional symmetric defective photonic crystals.** / King, Tzu Chyang; Wu, Chien-Jang.

Research output: Contribution to journal › Article

}

TY - JOUR

T1 - Properties of defect modes in one-dimensional symmetric defective photonic crystals

AU - King, Tzu Chyang

AU - Wu, Chien-Jang

PY - 2015/1/1

Y1 - 2015/1/1

N2 - (Graph Presented). We theoretically investigate the properties of defect modes in one-dimensional symmetric defective photonic crystals. We consider three defective photonic crystal structures, air/[(AB)NsAα(BA)Ns]Np/air, air/[(AB)NsABβA(BA)Ns]Np/air, and air/{[(AB)NsABβA(BA)Ns]Bγ}Np-1[(AB)NsABβA(BA)Ns]/air, where A and B are respectively taken to be the high- and low-index dielectric materials. The first has a defect layer of Aα, the second has a composite defect, ABβA, and the third has a interleaving defect Bγ. The effect of thickness on the defect mode is studied by varying the parameters α, β, and γ, respectively, for the above model structures. It is found that the positions and the number of defect modes can be significantly changed due to the change in the defect thickness. In addition, by increasing the repeated number Np, we can have multiple defect modes, leading to a possible design of tunable multichannel filter.

AB - (Graph Presented). We theoretically investigate the properties of defect modes in one-dimensional symmetric defective photonic crystals. We consider three defective photonic crystal structures, air/[(AB)NsAα(BA)Ns]Np/air, air/[(AB)NsABβA(BA)Ns]Np/air, and air/{[(AB)NsABβA(BA)Ns]Bγ}Np-1[(AB)NsABβA(BA)Ns]/air, where A and B are respectively taken to be the high- and low-index dielectric materials. The first has a defect layer of Aα, the second has a composite defect, ABβA, and the third has a interleaving defect Bγ. The effect of thickness on the defect mode is studied by varying the parameters α, β, and γ, respectively, for the above model structures. It is found that the positions and the number of defect modes can be significantly changed due to the change in the defect thickness. In addition, by increasing the repeated number Np, we can have multiple defect modes, leading to a possible design of tunable multichannel filter.

KW - Defect modes

KW - Photonic bandgaps

KW - Photonic crystals

UR - http://www.scopus.com/inward/record.url?scp=84921342542&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84921342542&partnerID=8YFLogxK

U2 - 10.1016/j.physe.2015.01.020

DO - 10.1016/j.physe.2015.01.020

M3 - Article

AN - SCOPUS:84921342542

VL - 69

SP - 39

EP - 46

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

SN - 1386-9477

ER -