In this paper, a new photonic crystal-based full-adder for the summation of three bits has been proposed. For realizing this device, three input waveguides are connected to the main waveguide. An optical power splitter is placed at the end of this waveguide. Concerning the amount of optical intensity inside this waveguide, two nonlinear resonant cavities transmit the waves toward the correct ports. When the cavities do not drop the optical waves, the splitter guides them toward the output ports. The maximum delay time of the presented structure is around 0.5 ps and shows the fastest response among the reported works. This improvement is obtained due to using the resonant cavities. The time analysis results in a maximum working frequency of 2 THz. Also, designing the structure in 93 µm² demonstrates that it is more compact than the previous works. The normalized low and high margins are obtained around 10% and 85%, respectively. So, the proposed device is capable of considering optical processing circuits.

在本文中，提出了一种新的基于光子晶体的三位加法器。为了实现该装置，将三个输入波导连接到主波导。光功率分配器放置在该波导的末端。关于此波导内部的光强度，两个非线性谐振腔将波向正确的端口传输。当型腔没有使光波掉落时，分光器将其导向输出端口。所展示结构的最大延迟时间约为0.5 ps，显示出已报道作品中最快的响应速度。由于使用了谐振腔而获得了这种改进。时间分析得出最大工作频率为2 THz。另外，以93 µm ²设计结构证明它比以前的作品更紧凑。分别在10％和85％左右获得标准化的低和高边距。因此，所提出的设备能够考虑光学处理电路。