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arXiv 2202.09490physics.optics
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光学涡旋光束发射器的优化设计

Gradient-Based Optimization of Optical Vortex Beam Emitters

Alexander D. White, Logan Su, Daniel I. Shahar, Ki Youl Yang, Geun Ho Ahn, Jinhie Skarda, Siddharth Ramachandran, Jelena Vučković

摘要:

涡旋光束是麦克斯韦方程组的稳定解,携带相位奇点和轨道角动量,这些独特的性质在基础科学,光通信和量子技术中产生了许多应用。涡旋光束发射器的可扩展集成和制造将使这些应用蓬勃发展,并实现传统光学无法实现的新应用。在这里,我们提出了一个通用的框架,以产生集成的涡旋光束发射器,利用光子逆设计。实验证明了角动量从-3 $\hbar$到3 $\hbar$的涡旋光束的产生。我们通过设计能够激发自定义涡旋光束光纤的涡旋光束多路复用器来展示该设计过程的通用性。最后,我们生产的铸造制造的光束发射器具有宽带宽和高效率,利用多层异构集成。

英文摘要:

Vortex beams are stable solutions of Maxwell's equations that carry phase singularities and orbital angular momentum, unique properties that give rise to many applications in the basic sciences, optical communications, and quantum technologies. Scalable integration and fabrication of vortex beam emitters will allow these applications to flourish and enable new applications not possible with traditional optics. Here we present a general framework to generate integrated vortex beam emitters using photonic inverse design. We experimentally demonstrate generation of vortex beams with angular momentum spanning -3$\hbar$ to 3$\hbar$. We show the generality of this design procedure by designing a vortex beam multiplexer capable of exciting a custom vortex beam fiber. Finally, we produce foundry-fabricated beam emitters with wide-bandwidths and high-efficiencies that take advantage of a multi-layer heterogeneous integration.

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