A graphene-based flexible filter was obtained via one-step laser heating of a polyimide film. The key parameters of a laser have been confirmed by comparing simulated results and experimental data. High-frequency components of input signals were filtered out effectively for different waveforms, such as sine, rectangular, triangle and pulse waveforms. In order to study filtering performance, this paper focused on amplitude frequency curve, phase frequency curve, transient response and mechanical stability. The phase frequency curve is linear distribution, indicating that it is convenient to control phase shift. The mechanical stability of the device remains good even after 5000 bends, which is unreported in previous work. This paper demonstrated that a graphene-based flexible filter prepared by one-step laser heating has excellent performance and opens new way of thinking about flexible electronics in the future.

通过聚酰亚胺膜的一步激光加热，获得了基于石墨烯的柔性过滤器。通过比较模拟结果和实验数据，可以确定激光器的关键参数。对于不同的波形（例如正弦，矩形，三角形和脉冲波形），有效滤除了输入信号的高频分量。为了研究滤波性能，本文重点研究了振幅频率曲线，相位频率曲线，瞬态响应和机械稳定性。相频曲线呈线性分布，表明控制相移较为方便。即使经过5000次弯曲，设备的机械稳定性仍然保持良好，这在以前的工作中未曾报道过。