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High performance integrated photonic circuit based on inverse design method
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DOI：10.29026/oea.2022.210061.png)
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Abstract
En 中文
The basic indexes of all-optical integrated photonic circuits include high-density integration, ultrafast response and ultra -low energy consumption. Traditional methods mainly adopt conventional micro/nano-structures. The overall size of the circuit is large, usually reaches hundreds of microns. Besides, it is difficult to balance the ultrafast response and ultra-low energy consumption problem, and the crosstalk between two traditional devices is difficult to overcome. Here, we pro-pose and experimentally demonstrate an approach based on inverse design method to realize a high-density, ultrafast and ultra-low energy consumption integrated photonic circuit with two all-optical switches controlling the input states of an all-optical XOR logic gate. The feature size of the whole circuit is only 2.5 pm x 7 pm, and that of a single device is 2 pm x 2 pm. The distance between two adjacent devices is as small as 1.5 pm, within wavelength magnitude scale. Theoret-ical response time of the circuit is 150 fs, and the threshold energy is within 10 fJ/bit. We have also considered the crosstalk problem. The circuit also realizes a function of identifying two-digit logic signal results. Our work provides a new idea for the design of ultrafast, ultra-low energy consumption all-optical devices and the implementation of high-density photonic integrated circuits.
Keywords:
all-optical integrated photonic circuit
inverse design
all-optical switch
all-optical XOR logic gate