Low-Power Active Tunable Microwave Photonic Filter Using Photonic Crystal Nanocavities
Low-Power Active Tunable Microwave Photonic Filter Using Photonic Crystal Nanocavities
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使用光子晶体纳米腔的低功耗有源可调谐微波光子滤波器
DOI：
10.1109/lpt.2020.3008865
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发表时间：
2020-08
影响因子：
2.6
通讯作者：
Liao Shasha
中科院分区：
文献类型：
--
作者：
Liu Li;Liao Shasha
We propose and experimentally demonstrate an all-optical microwave filter with tunable central frequency and bandwidth based on the silicon cascaded photonic crystal (PC) cavities. As the light-matter interaction is largely enhanced in the PC nanocavity with small mode volume, its transmission spectrum could be efficiently adjusted. Hence, with injecting ultra-low pump powers to control the transmissions of the two cascaded PC cavities, the central frequency and bandwidth of the microwave photonic filter (MPF) could be simultaneously tuned. The size of the cascaded PC nanocavities is only $200~\mu \text{m}^{\mathbf {2}}$ . The proposed MPF with significant features of all-optical control, ultra-high tuning efficiencies and large rejection ratios is beneficial to build on-chip energy-efficient all-optical microwave systems.
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