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Optimization of High Responsivity Waveguide Photodiode with a Thin Absorption Layer
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- Authors
- Jeong-Woo Park, Hyun-Sung Ko, Eun-Deok Sim, Yong-Soon Baek
- Issue Date
- 2007-02
- Citation
- Applied Physics Letters, v.90, no.9, pp.1-3
- ISSN
- 0003-6951
- Publisher
- American Institute of Physics (AIP)
- Language
- English
- Type
- Journal Article
- Abstract
- The optimization of a waveguide photodiode (WGPD) having a thin absorption layer is discussed. With an absorption layer thickness of less than 0.1 μm, responsivity of 1.09 AW was achieved for lensed-fiber coupling. For flat-ended fiber coupling, responsivity of 0.93 AW was achieved. An absorption layer thickness of more than 100 횇 is required for high responsivity and low polarization dependency. A formula for frequency response in a WGPD with a thin absorption layer is also obtained. This formula gives the optimized WGPD structure for high speed operation with high responsivity. © 2007 American Institute of Physics.
- KSP Keywords
- Absorption layer, Fiber Coupling, Frequency response(FreRes), Low polarization, Polarization dependency, Waveguide photodiodes(WGPD), high responsivity, high-speed operation, layer thickness