ShanghaiTech University Knowledge Management System
| Ultra-fast, high-power MUTC Photodiodes with bandwidth-efficiency product over 130 GHz à 100% | |
| 2025-01-06 | |
| 状态 | 已发表 |
| 摘要 | The accelerating demand for wireless communication necessitates wideband, energy-efficient photonic sub-terahertz (subTHz) sources to enable ultra-fast data transfer. However, as critical components for THz photonic mixing, photodiodes (PDs) face a fundamental trade-off between quantum efficiency and bandwidth, presenting a major obstacle to achieving high-speed performance with high optoelectronic conversion efficiency. Here, we overcome this challenge by demonstrating an InP-based, waveguide-integrated modified unitraveling carrier photodiode (MUTC-PD) with a terahertz bandwidth exceeding 200 GHz and a bandwidth-efficiency product (BEP) surpassing 130 GHz à 100%. Through the integration of a spot-size converter (SSC) to enhance external responsivity, alongside optimized electric field distribution, balanced carrier transport, and minimized parasitic capacitance, the device achieves a 3-dB bandwidth of 206 GHz and an external responsivity of 0.8 A/W, setting a new benchmark for BEP. Packaged with WR-5.1 waveguide output, it delivers radio frequency (RF) power exceeding-5 dBm across the 127–185 GHz frequency range. As a proof of concept, we achieved a wireless transmission of 54 meters with a single-line rate of up to 120 Gbps, leveraging photonics-aided technology without requiring a low-noise amplifier (LNA). This work establishes a pathway to significantly enhance optical power budgets and reduce energy consumption, presenting a transformative step toward high-bandwidth, high-efficiency sub-THz communication systems and next-generation wireless networks. |
| 语种 | 英语 |
| DOI | arXiv:2501.02812 |
| 相关网址 | 查看原文 |
| 出处 | Arxiv |
| 收录类别 | PPRN.PPRN |
| WOS记录号 | PPRN:120312825 |
| WOS类目 | Optics ; Physics, Applied |
| 文献类型 | 预印本 |
| 条目标识符 | https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/483962 |
| 专题 | 信息科学与技术学院 |
| 作者单位 | 1.School of Information Science and Technology, ShanghaiTech University, Shanghai 201210, China 2. 3. 4. 5. |
| 推荐引用方式 GB/T 7714 | Li, Linze,Long, Tianyu,Yang, Xiongwei,et al. Ultra-fast, high-power MUTC Photodiodes with bandwidth-efficiency product over 130 GHz à 100%. 2025. |
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