In this paper, a novel structure for realization of a 2-bit all-optical analog-to-digital converter (AOADC) is proposed. This structure consists of two plasmonic MIM waveguides and a nanodisk cavity filled with a Kerr-type nonlinear material. Numerical 2D finite-difference time-domain simulations show that the maximum sampling rate of the purposed structure can approximately reach to 5 TS/s. Furthermore, for the proposed structure, the input wavelength and the input power range can be tuned by adjusting the radius of the disk-shaped resonator and the signal wavelength, respectively. Since plasmonic devices have a high potential to be used in integrated optical circuits, the importance of this work become even more significant. Moreover, to the best of the authors’ knowledge, this is the first time that an AOADC base surface plasmonic MIM has been introduced.

在本文中，提出了一种用于实现 2 位全光模数转换器 (AOADC) 的新型结构。该结构由两个等离子体 MIM 波导和一个填充了克尔型非线性材料的纳米盘腔组成。数值二维有限差分时域模拟表明，目标结构的最大采样率可以达到约 5 TS/s。此外，对于所提出的结构，输入波长和输入功率范围可以通过分别调整盘形谐振器的半径和信号波长来调整。由于等离子体器件在集成光学电路中具有很高的潜力，因此这项工作的重要性变得更加重要。此外，据作者所知，