直流偏置集成铌酸锂电光调制器中的迟滞与陷阱发射
Hysteresis and trap emission in dc-biased integrated lithium niobate electro-optic modulators
- John A. Paulson School of Engineering and Applied Sciences, Harvard University（哈佛大学约翰·A·保尔森工程与应用科学学院）
- Northwestern University（西北大学）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
针对铌酸锂电光调制器直流偏置引起的迟滞退化，提出基于电荷俘获动力学的主动重置协议，可逆转迟滞并恢复响应幅度。
AI中文摘要：
电光效应对于集成光子电路的低功耗和高效调谐至关重要。然而，在诸如铌酸锂等电光材料中，长时间直流偏置会导致众多非理想特性的出现，包括迟滞——即直流电光响应的幅度和线性度的持续退化。我们证明，在零偏置和反向偏置条件下，只要有足够的时间或反向电压，电光迟滞可以被逆转，这与底层物理的缺陷模型一致。具体而言，我们发现短时间尺度上的漂移现象可以用接触结附近的电荷俘获动力学来解释，并由此设计了一种主动重置协议，该协议能够恢复响应的幅度并部分恢复漂移时间尺度。
英文摘要：
The electro-optic effect is crucially important for low power and efficient tuning of integrated photonic circuits. However, in electro-optic materials such as lithium niobate, dc biasing for an extended duration of time results in the emergence of numerous nonidealities, including hysteresis -- a persistent degradation of the magnitude and linearity of the dc electro-optic response. We show that electro-optic hysteresis can be reversed under both zero-bias and reverse-bias conditions, given sufficient time or reverse voltage and consistent with a defect model of the underlying physics. Specifically, we find that drift phenomena at short time scales can be explained by charge trapping dynamics near the contact junction, and thereby devise an active reset protocol that restores the magnitude of the response and partially restores the drift time scales.
