Veisi Ehsan, Seifouri Mahmood, Olyaee Saeed
Faculty of Electrical Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran.
Nano-Photonics and Optoelectronics Research Laboratory (NORLab), Shahid Rajaee Teacher Training University, 16788-15811, Tehran, Iran.
Heliyon. 2024 Aug 2;10(15):e35680. doi: 10.1016/j.heliyon.2024.e35680. eCollection 2024 Aug 15.
In this paper, a novel interference-based nanostructure was designed and simulated to realize an all-optical 2-bit reversible comparator by employing a novel technique. The plane wave expansion (PWE) method was adopted to analyze the encoder design and frequency modes. Aside from downsizing, the finite-difference time-domain (FDTD) method was utilized for the simulation and numerical analysis of the design proposed herein. An ultra-compact nanostructure with a 129.8 μm footprint was utilized for the all-optical 2-bit reversible comparator. One of the noteworthy characteristics of the proposed nanostructure was its excellent contrast ratio (i.e., 13.8 dB) in comparison to other nanostructures. The bitrate and delay time in this nanostructure were 3.33 Tb/s and 300 fs, respectively. Based on the findings of the simulations conducted at a central wavelength of 1.55 μm, it is recommended to employ the nanostructure proposed herein during the third telecom window. A photonic crystal nano-resonator was utilized to design the high-performance all-optical 2-bit reversible comparator, which may also be employed in integrated optical circuits (IOCs).
在本文中，通过采用一种新技术，设计并模拟了一种基于干涉的新型纳米结构，以实现全光2比特可逆比较器。采用平面波展开（PWE）方法来分析编码器设计和频率模式。除了尺寸缩小外，还利用时域有限差分（FDTD）方法对本文提出的设计进行模拟和数值分析。一种具有129.8μm占地面积的超紧凑纳米结构被用于全光2比特可逆比较器。与其他纳米结构相比，所提出的纳米结构的一个显著特征是其优异的对比度（即13.8dB）。该纳米结构中的比特率和延迟时间分别为3.33Tb/s和300fs。基于在中心波长1.55μm处进行的模拟结果，建议在第三通信窗口期间采用本文提出的纳米结构。利用光子晶体纳米谐振器设计了高性能全光2比特可逆比较器，该比较器也可用于集成光学电路（IOC）。
