Unveiling local molecular desorption dynamics using higher-order optical resonances.

Mingquan Deng, Xiujie Dou, Xiaoyu Wang, Yin Yin, Xun Guan, Libo Ma, Xing Ma, Jiawei Wang

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Article in Frontiers of optoelectronics, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

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8 authors.

Mingquan DengSchool of Integrated Circuits, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China.

Xiujie DouSchool of Integrated Circuits, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China.

Xiaoyu WangSchool of Physics and Optoelectronic Engineering, Hainan University, Haikou, 570228, China. xiaoyuwang@hainanu.edu.cn.

Yin YinSchool of Materials Science and Engineering, Jiangsu University, Zhenjiang, 212013, China.

Xun GuanTsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China.

Libo MaLeibniz IFW Dresden, Dresden, 01069, Germany.

Xing MaSchool of Integrated Circuits, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China. maxing@hit.edu.cn.

Jiawei WangSchool of Integrated Circuits, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China. wangjw7@hit.edu.cn.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Understanding the sorption dynamics between water molecules and various solid surfaces is of great interest in diverse fundamental and industrial research. For studying such dynamics in a microsystem, existing investigations mainly focus on sorption behaviors mediated by external temperature variations. Here, we demonstrate a route to in situ sensitive detection of laser irradiation-induced localized water molecule desorption at a sub-monolayer level on an oxide surface. Harnessing a tailored set of optical whispering-gallery-mode (WGM) resonances in a nanomembrane-based microtube cavity, the desorption can be tracked by resonance mode shift in real-time, and further explained using a combination of pseudo-first-order and pseudo-second-order models. Additionally, upon adjusted laser excitation locations, the axial-mode-dependent responses enable the retrieval of corresponding profiles of desorption-induced perturbation at equilibrium. This study provides new insights into molecular desorption kinetics and introduces a spatially resolved sensing technique with applications in surface science, molecular sensing, and the study of desorption dynamics at the nanoscale.

Indexed as

High-order axial modeMicrotube cavityMolecular desorptionOptical sensingWhispering-gallery-mode (WGM)

Identifiers

PMID40719922

DOI10.1007/s12200-025-00159-1

PMCPMC12304327

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