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| 1 | 基于准连续域束缚态介质超表面的光微流折射率传感研究显示文摘准连续域束缚态(Quasi-BIC)是超表面中一种特殊共振模,具有极高的品质因子,可以极大地提高光与物质的相互作用,在荧光增强、纳米激光、光传感以及非线性光学等领域均有重要应用。本文基于我们前期对quasi-BIC产生的理论,研究quasi-BIC介质超表面在折射率传感方面的应用。本文给出了传感系统的基本结构,利用电子束光刻技术结合注塑工艺完成了样品光流控结构的制备,并初步测试性能。研究结果表明,得益于产生quasi-BIC的新方法,该超表面具有两个高Q值quasi-BIC共振峰(1.523μm和1.570μm,品质因子分别为3069和4071)。以四种折射率溶液(n分别为1.450/1.462/1.470/1.480)为样品的测试实验表明,两个共振峰均能完成折射率检测,灵敏度S分别为452 nm/RIU、428 nm/RIU,性能评价指标FOM分别为376.7、372,优于现有文献;共振波长和折射率之间线性度良好,展现了quasi-BIC超表面在折射率传感中的应用潜力。 | 胡维东 杜响 刘思玉 黄万霞 石风华 石建平 李光元 | 2023 | 光电工程2023，50，9： | 0 |
| 2 | Knot-inspired optical sensors for slip detection and friction measurement in dexterous robotic manipulation显示文摘Friction plays a critical role in dexterous robotic manipulation.However,realizing friction sensing remains a challenge due to the difficulty in designing sensing structures to decouple multi-axial forces.Inspired by the topological mechanics of knots,we construct optical fiber knot(OFN)sensors for slip detection and friction measurement.By introducing localized self-contacts along the fiber,the knot structure enables anisotropic responses to normal and frictional forces.By employing OFNs and a change point detection algorithm,we demonstrate adaptive robotic grasping of slipping cups.We further develop a robotic finger that can measure tri-axial forces via a centrosymmetric architecture composed of five OFNs.Such a tactile finger allows a robotic hand to manipulate human tools dexterously.This work could provide a straightforward and cost-effective strategy for promoting adaptive grasping,dexterous manipulation,and human-robot interaction with tactile sensing. | Jing Pan Qi Wang Shuaikang Gao Zhang Zhang Yu Xie Longteng Yu Lei Zhang | 2023 | Opto-Electronic Advances2023，6，10： | 0 |
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