Due to the projected saturation of Moore’s law, as well as the drastically increasing trend of bandwidth with lower power consumption, silicon photonics has emerged as one of the most promising alternatives that has attracted a lasting interest due to the accessibility and maturity of ultra-compact passive and active integrated photonic components. In this Letter, we demonstrate a ripple-carry electro-optic 2-bit full adder using microdisks, which replaces the core part of an electrical full adder by optical counterparts and uses light to carry signals from one bit to the next with high bandwidth and low power consumption per bit. All control signals of the operands are applied simultaneously within each clock cycle. Thus, the severe latency issue that accumulates as the size of the full adder increases can be circumvented, allowing for an improvement in computing speed and a reduction in power consumption. This approach paves the way for future high-speed optical computing systems in the post-Moore’s law era.

中文翻译：

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用于光学计算的基于硅微盘的全加法器

由于摩尔定律的预期饱和，以及带宽以更低的功耗急剧增加的趋势，硅光子学已经成为最有希望的替代方法之一，由于超紧凑的可访问性和成熟性引起了人们的长期关注无源和有源集成光子组件。在这封信中，我们演示了使用微盘的带有脉动的电光2位全加法器，该光学加法器用光学部件代替了电气全加法器的核心部分，并利用光将信号从一个位传输到下一个，并具有高带宽和每位功耗低。在每个时钟周期内同时施加操作数的所有控制信号。因此，可以避免随着全加器大小的增加而累积的严重延迟问题，可以提高计算速度并降低功耗。这种方法为后摩尔定律时代的未来高速光学计算系统铺平了道路。