Experimental evidence of photonic crystal waveguides with wide bandwidth in two-dimensional Al2O3 rods array

Yong Wang; Dengguo Zhang; Shixiang Xu; Biaogang Xu; Zheng Dong; Tan Huang

doi:10.3788/COL201715.062301

Journals >Chinese Optics Letters >Volume 15 >Issue 6 >Page 062301 > Article

Chinese Optics Letters
Vol. 15, Issue 6, 062301 (2017)

Experimental evidence of photonic crystal waveguides with wide bandwidth in two-dimensional Al₂O₃ rods array

Yong Wang¹, Dengguo Zhang^2、*, Shixiang Xu², Biaogang Xu², Zheng Dong², and Tan Huang²

Author Affiliations

¹College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China

²College of Electronic Science and Technology, Shenzhen University, Shenzhen 518060, China

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DOI: 10.3788/COL201715.062301 Cite this Article Set citation alerts

Yong Wang, Dengguo Zhang, Shixiang Xu, Biaogang Xu, Zheng Dong, Tan Huang. Experimental evidence of photonic crystal waveguides with wide bandwidth in two-dimensional Al₂O₃ rods array[J]. Chinese Optics Letters, 2017, 15(6): 062301 Copy Citation Text

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Fig. 1. (a) 2D PCs defect structure; (b) 2D square lattice PCW in a transparent shell; (c) schematic diagram of the PCW; (d) PBG of the 2D square lattice PCs.

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(a) Ez field distribution in the PCW; (b) the amplitude of the Ez field; (c) and (d) the distribution of power in the PCs at the normalized frequency of 0.28(2πc/a); (e) and (f) the distribution of power in the PCW at the central frequency of 0.4016(2πc/a); (g) and (h) the distribution of power in the PCs at the central frequency of 0.52(2πc/a).

Fig. 2. (a) Ez field distribution in the PCW; (b) the amplitude of the Ez field; (c) and (d) the distribution of power in the PCs at the normalized frequency of

0.28 (2 π c / a)

; (e) and (f) the distribution of power in the PCW at the central frequency of

0.4016 (2 π c / a)

; (g) and (h) the distribution of power in the PCs at the central frequency of

0.52 (2 π c / a)

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Fig. 3. (a) Sectional view of the PCs sample; (b) experimental setup for measuring the PBG of the PCs.

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Fig. 4. (a) Logarithmic value of the reflection efficiency of Port A; (b) the isolation

τ_{B A}

of Ports B to A; (c) the isolation

τ_{A B}

of Ports A to B; (d) the logarithmic value of the reflection efficiency of Port B.

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Fig. 5. (a) Sectional view of the PCW sample; (b) experimental setup for measuring the transmission efficiency between Port A and Port C; (c) experimental setup for measuring the transmission efficiency between Port A and Port D.

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Fig. 6. Logarithmic value of the transmission efficiency between Port A and Port C: (a)

S_{21}

and (b)

S_{12}

; Logarithmic value of the transmission efficiency between Port A and Port D: (c)

S_{21}

and (d)

S_{12}

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Numerical value	Normalized frequency range of PBG	$0.3525 (2 π c / a) - 0.4687 (2 π c / a)$
	Normalized central frequency	$0.4016 (2 π c / a)$
	Frequency range of PBG	8.81–11.72 GHz (29.1%)
	Central frequency $f_{0}$	10.04 GHz
	Transmission efficiency at $f_{0}$	74.9%
Experimental value	$f_{0}$	10 GHz
	$τ_{B A}$ at $f_{0}$	$- 55.67 dB$
	$τ_{A B}$ at $f_{0}$	$- 57.24 dB$
	Frequency range of PBG ( $τ < - 20 dB$ )	8.62–11.554 GHz (relative bandwidth is 29.34%)
	$R_{A}$ at $f_{0}$	$- 0.45 dB$ (90.2%)
	$R_{B}$ at $f_{0}$	$- 0.45 dB$ (90.2%)
	Transmission efficiency at $f_{0}$	72.9%