Ultra-fast Waveguide MUTC Photodiodes over 220 GHz
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866913231450144768 |
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| author | Li, Linze Wang, Luyu Long, Tianyu Zhang, Zhouze Lu, Juanjuan Chen, Baile |
| author_facet | Li, Linze Wang, Luyu Long, Tianyu Zhang, Zhouze Lu, Juanjuan Chen, Baile |
| contents | We present InP-based evanescently-coupled waveguide modified uni-traveling carrier photodiodes (MUTC-PDs) exhibiting a breakthrough in bandwidth. The optimization of carrier transport and optical coupling is achieved through a detailed discussion on the design of the cliff layer and waveguide layer. Addressing the parasitic capacitance challenge, we introduce benzocyclobutene (BCB) beneath the PD electrodes, effectively overcoming the bandwidth bottleneck associated with the RC time constant. Devices with sizes of 2 * 7 um2 and 2 * 10 um2 achieve 3-dB bandwidths over 220 GHz, along with external responsivities of 0.161 A/W and 0.237 A/W, respectively. Notably, the RF output power reaches a peak of -1.69 dBm at 215 GHz for 2 * 15 um2 PDs. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_07491 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Ultra-fast Waveguide MUTC Photodiodes over 220 GHz Li, Linze Wang, Luyu Long, Tianyu Zhang, Zhouze Lu, Juanjuan Chen, Baile Applied Physics Optics We present InP-based evanescently-coupled waveguide modified uni-traveling carrier photodiodes (MUTC-PDs) exhibiting a breakthrough in bandwidth. The optimization of carrier transport and optical coupling is achieved through a detailed discussion on the design of the cliff layer and waveguide layer. Addressing the parasitic capacitance challenge, we introduce benzocyclobutene (BCB) beneath the PD electrodes, effectively overcoming the bandwidth bottleneck associated with the RC time constant. Devices with sizes of 2 * 7 um2 and 2 * 10 um2 achieve 3-dB bandwidths over 220 GHz, along with external responsivities of 0.161 A/W and 0.237 A/W, respectively. Notably, the RF output power reaches a peak of -1.69 dBm at 215 GHz for 2 * 15 um2 PDs. |
| title | Ultra-fast Waveguide MUTC Photodiodes over 220 GHz |
| topic | Applied Physics Optics |
| url | https://arxiv.org/abs/2402.07491 |