| Citation: |
Zhang Yunxiao, Liao Zaiyi, Zhao Lingjuan, Zhu Hongliang, Pan Jiaoqing, Wang Wei. A high-efficiency high-power evanescently coupled UTC-photodiode[J]. Journal of Semiconductors, 2009, 30(4): 044008. doi: 10.1088/1674-4926/30/4/044008
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Zhang Y X, Liao Z Y, Zhao L J, Zhu H L, Pan J Q, Wang W. A high-efficiency high-power evanescently coupled UTC-photodiode[J]. J. Semicond., 2009, 30(4): 044008. doi: 10.1088/1674-4926/30/4/044008.
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Abstract
The effects of the multimode diluted waveguide on quantum efficiency and saturation behavior of the evanescently coupled uni-traveling carrier (UTC) photodiode structures are reported. Two kinds of evanescently coupled uni-traveling carrier photodiodes (EC-UTC-PD) were designed and characterized: one is a conventional EC-UTC-PD structure with a multimode diluted waveguide integrated with a UTC-PD; and the other is a compact EC-UTC-PD structure which fused the multimode diluted waveguide and the UTC-PD structure together. The effect of the absorption behavior of the photodiodes on the efficiency and saturation characteristics of the EC-UTC-PDs is analyzed using 3-D beam propagation method, and the results indicate that both the responsivity and saturation power of the compact EC-UTC-PD structures can be further improved by incorporating an optimized compact multimode diluted waveguide. -
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