Topological sensing with photonic arrays of resonant circular waveguides
Topological sensing with photonic arrays of resonant circular waveguides
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DOI：
10.1103/physrevresearch.3.033106
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发表时间：
2021-07-30
影响因子：
4.2
通讯作者：
Weng, Binbin
中科院分区：
文献类型：
--
作者：
Arledge, Kiernan E.;Uchoa, Bruno;Weng, Binbin
我们提出了一种具有亚波长光栅的谐振型圆形介质光波导的光子阵列，可以设计成一种坚固而灵敏的拓扑化学传感器。该设备可以通过光子边缘模式检测给定化学物种的痕量，这些模式对大多数无序源是不敏感的。我们在中红外下进行了一次模拟，模拟了化学分子与强耦合的光子谐振器晶格接触时产生的吸收损耗。由于该设备的拓扑性质，其化学灵敏度与系统大小呈线性关系，并可在毫米级达到十亿分之几的范围。我们的发现表明，拓扑化学传感器可以推动新型片上集成光子传感技术的发展。
We propose a photonic array of resonant circular dielectric waveguides with subwavelength grating that can be designed as a robust and sensitive topological chemical sensor. The device can detect trace amounts of a given chemical species through photonic edge modes that are impervious to most sources of disorder. We perform a simulation in the midinfrared that accounts for the absorption loss introduced by chemical molecules in contact with a strongly coupled photonic lattice of resonators. Due to the topological nature of the device, its chemical sensitivity scales linearly with the system size and can reach parts-per-billion range at the millimeter scale. Our findings suggest that topological chemical sensors could empower the development of novel on-chip integrated photonic sensing technologies.