While black phosphorus has shown excellent optoelectronic properties in many aspects, the environmental instability ultimately places limits on its practical applications. Black arsenic–phosphorus (b‐AsP), an alloy of black phosphorus with arsenic atoms, has emerged as a new 2D material with better stability. Recently, the heterostructure via integration of 2D material with nanophotonic waveguides is opening an avenue for many on‐chip applications of phosphorene. However, the thermo‐optic (TO) properties, which are widely used for waveguide heaters, are not studied on b‐AsP yet. Herein, the TO effects of a b‐AsP/silicon van der Waals heterostructure are first investigated and its application as a transparent waveguide heater is demonstrated. A high efficiency of 0.74 nm mW⁻¹ is achieved with a nonresonant and broadband heater based on 20 nm thick b‐AsP, which eliminates the need for enhancement by cavity‐assisted light–matter interaction, and thus allows for compact footprint, broadband operation, and low latency.

中文翻译：

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基于黑砷-磷的高效硅光子微加热器

尽管黑磷在许多方面都表现出优异的光电性能，但环境不稳定性最终限制了其实际应用。黑砷磷（b-AsP）是一种黑磷与砷原子的合金，已成为一种具有更好稳定性的新型2D材料。最近，通过将2D材料与纳米光子波导集成在一起的异质结构为磷在许多片上应用打开了途径。但是，尚未在b-AsP上研究广泛用于波导加热器的热光（TO）特性。在此，首先研究了Ab-AsP /硅范德华异质结构的TO效应，并证明了其作为透明波导加热器的应用。0.74 nm mW ^-1的高效率 使用基于20 nm厚b-AsP的非谐振宽带加热器可以实现这一点，该加热器无需借助腔辅助的光-质相互作用来进行增强，从而实现了紧凑的占用空间，宽带工作和低延迟。