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arXiv 1806.04416physics.optics
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非互易传输圆偏振光的纳米光子全光二极管

A nanophotonic all-optical diode for non-reciprocal transmission of circularly polarized lights

Hongming Fei, Min Wu, Han Lin, Xin Liu, Yibiao Yang, Mingda Zhang, Binzhao Cao

摘要:

全光二极管(AOD)在量子光学和信息处理中发挥着重要作用,其中信息是由光子编码的。只有圆偏振光才能携带光子的自旋态,这在量子计算和信息处理中得到了广泛的应用,并使新的研究领域成为可能,例如手征量子光学。一个理想的声光偏转器应该能够工作在任意偏振态,包括圆偏振光,这还没有被证明。在本文中,我们第一次从理论上证明了一种能够与圆偏振光一起工作的纳米光子AOD。AOD纳米结构基于二维二氧化硅和硅光子晶体(PhCs)的异质结构。通过控制光子晶体的有效折射率和使用倾斜的界面,我们能够利用广义全反射原理来实现圆偏振光的非互易传输。此外,纳米光子AOD能够在1497 nm至1666 nm的宽波长范围内实现大于0.6的高前向透射率和接近1的高对比度。所设计的纳米光子声光器件在光量子信息处理和计算中具有广阔的应用前景。

英文摘要:

All optical diodes (AODs) play an important role in quantum optics and information processing, in which the information is encoded by photons. Only circularly polarized lights are able to carry the spin states of photons, which has been intensively used in quantum computing and information processing and enable new research fields, such as chiral quantum optics. An ideal AOD should be able to work with arbitrary polarizations states, including circularly polarized lights, which has not been demonstrated yet. In this paper, we theoretically demonstrate for the first time a nanophotonic AOD that is able to work with circularly polarized lights. The AOD nanostructure is based on a heterostructure of two-dimension silica and silicon photonic crystals (PhCs). By controlling the effective refractive indices of the PhCs and using an inclined interface, we are able to exploit generalized total reflection principle to achieve non-reciprocal transmission of circularly polarized lights. In addition, the nanophotonic AOD is able to achieve high forward transmittance greater than 0.6 and high contrast ratio close to 1 in a broad wavelength range of 1497 nm to 1666 nm. The designed nanophotonic AOD will find broad applications in optical quantum information processing and computing.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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