High-order Autler–Townes splitting in electrically tunable photonic molecules

Whispering gallery mode optical microresonators represent a promising avenue for realizing optical analogs of coherent light–atom interactions,circumventing experimental complexities.All-optical analogs of Autler–Townes splitting have been widely demonstrated,harnessing coupled optical microresonators,also known as photonic molecules,wherein the strong coupling between resonant fields enables energy level splitting.Here,we report the characterizations of Autler–Townes splitting in waveguide-coupled microring dimers featuring mismatched sizes.By exploiting backscattering-induced coupling via Rayleigh and Mie scatterers in individual rings,high-order Autler–Townes splitting has been realized,yielding supermode hybridization in a multi-level system.Upon resonance detuning using an integrated phase shifter,intra-cavity coupling-induced splitting becomes almost indistinguishable at the zero-detuning point where the strong inter-cavity coupling counteracts the imbalance of backscattering strengths in individual rings.Through demonstrations on the maturing silicon photonics platform,our findings establish a framework of electrically tunable photonic molecules for coupling-mediated Autler–Townes splitting,offering promising prospects for on-chip signal generation and processing across classical and quantum regimes.

Chinese intracranial hemorrhage imaging database:constructing a structured multimodal intracranial hemorrhage data warehouse

To the Editor:China has the largest number of intracerebral hemorrhage(ICH)patients of any single country,[1]and efforts to mine,utilize,and share the relevant data are warranted.As a structured diagnosis and treatment pipeline for ICH has been demonstrated to improve patient outcomes,there is an urgent need to construct a large medical database to store relevant data and facilitate data mining,analysis,and sharing.However,traditional stroke databases are dominated by text data without comprehensive imaging data,and few studies have focused on the construction of databases on ICH.[2,3]To integrate multimodal data on ICH and standardize data processing and feedback,the Chinese Intracranial Hemorrhage Imaging Database(CICHID)was established by Peking Union Medical College Hospital in 2019 and is under continuous refinement.Differing from traditional text-based databases,CICHID is a large multimodal data warehouse implementing comprehensive clinical data storage and multidimensional imaging data analysis.

超薄类皮肤固体电子器件研究进展

随着技术的进步与社会的发展,柔性电子器件与人体集成是电子信息与健康医疗紧密结合的必然趋势.具有可拉伸、可变形、超柔性等特点的类皮肤固体电子器件能与人体长时间舒适集成,未来将在医学诊断、医学治疗、人机交互和机器人环境感知等领域发挥重要作用.本文以超薄类皮肤固体电子器件研究为主题,重点介绍其在体温、体表应变、血氧、血糖等人体基本生理参数连续监测以及生物能量收集方面的应用进展.随着人工智能的成熟和大数据环境的完善,类皮肤固体电子将在人类未来的生命健康领域发挥不可替代的作用.

混合经济与最优跨国技术授权——基于运输成本创新的空间价格歧视模型

混合所有制改革对跨国技术授权博弈双方策略的影响,关系到企业运转和经济效率。本文构建空间模型,研究交易成本节约型技术的跨国授权中,本国企业的所有制形式对外国专利持有者授权方式的影响。研究结果表明,伴随本国企业民营化程度提高,外国企业的最优授权形式由固定费用授权转向特许权收费授权。技术授权普遍有利于社会福利提升,但混合所有制改革引起的外国企业授权策略的调整,或使社会福利面临"策略式陷阱"而出现下降。