Zheng Shuang, Cao Xiaoping, Wang Jian
Opt Lett. 2020 Feb 15;45(4):1035-1038. doi: 10.1364/OL.387638.
Intensive research in photonics has discovered many original and fascinating optical phenomena associated with the physics of Fano resonances. Here we extend the research of Fano resonance to on-chip multiple modes and high-order mode, which can be called multimode Fano resonance. By exploiting both wavelength and mode degrees of freedom, we demonstrate a compact structure to engineer wavelength- and shape-controlled multimode Fano resonances on an integrated photonic platform. Both simulated and experimental results indicate that the unambiguous asymmetric spectra line shapes for both transverse electric modes (${{\rm TE}_0}$TE and ${{\rm TE}_1}$TE) can be further applied to low-power mode switching. The demonstrated on-chip multimode Fano resonances scheme may provide a new perspective for exploring the advantages and applications of multimode Fano resonances in integrated photonics.
光子学领域的深入研究发现了许多与法诺共振物理相关的新颖且引人入胜的光学现象。在此，我们将法诺共振的研究扩展到片上多模和高阶模，这可称为多模法诺共振。通过利用波长和模式自由度，我们展示了一种紧凑结构，可在集成光子平台上设计波长和形状可控的多模法诺共振。模拟和实验结果均表明，横向电模式（${\rm TE}_0$和${\rm TE}_1$）明确的非对称光谱线形可进一步应用于低功耗模式切换。所展示的片上多模法诺共振方案可能为探索多模法诺共振在集成光子学中的优势和应用提供新的视角。
