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arXiv 1511.08321physics.optics
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腔增强型二阶非线性光子逻辑电路

Cavity enhanced second-order nonlinear photonic logic circuits

Rahul Trivedi, Uday K Khankhoje, Arka Majumdar

摘要:

实现量子光子逻辑的一大障碍是现有材料的弱光学非线性,这导致了大的功耗。本文介绍了二阶非线性双模腔全光逻辑($χ^{(2)}$)及其网络的理论设计。利用从Wigner准概率分布函数导出的半经典模型,我们分析了实现光与门和光锁存器的网络的功耗和信噪比(SNR)。二阶和三阶$(χ^{(3)})$光学逻辑之间的比较揭示,虽然$χ^{(3)}$设计在相同输入功率的SNR方面优于$χ^{(2)}$设计,但采用$χ^{(3)}$非线性需要使用具有超高品质因数($Q\sim 10^6$)的腔,以在显著更小的品质因数($Q \sim 10^4$)下实现与$χ^{(2)}$设计相当的栅极功耗。使用现实的估计$χ^{(2)}$和$χ^{(3)}$非线性的可用材料,我们表明,在可实现的品质因数($Q \sim 10^4$),$χ^{(2)}$设计是一个数量级的能源效率比相应的$χ^{(3)}$设计。

英文摘要:

A large obstacle for realizing quantum photonic logic is the weak optical nonlinearity of available materials, which results in large power consumption. In this paper, we present the theoretical design of all-optical logic with second order ($χ^{(2)}$) nonlinear bimodal cavities and their networks. Using semiclassical models derived from the Wigner quasi-probability distribution function, we analyze the power consumption and signal-to-noise ratio (SNR) of networks implementing an optical AND gate and an optical latch. Comparison between the second and third order $(χ^{(3)})$ optical logic reveals that while the $χ^{(3)}$ design outperforms the $χ^{(2)}$ design in terms of the SNR for the same input power, employing the $χ^{(3)}$ nonlinearity necessitates the use of cavities with ultra high quality factors ($Q\sim 10^6$) to achieve gate power consumption comparable to that of the $χ^{(2)}$ design at significantly smaller quality factors ($Q \sim 10^4$). Using realistic estimates of the $χ^{(2)}$ and $χ^{(3)}$ nonlinear susceptibilities of available materials, we show that at achievable quality factors ($Q \sim 10^4$), the $χ^{(2)}$ design is an order of magnitude more energy efficient than the corresponding $χ^{(3)}$ design.

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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