|
| 法布里–珀罗光学微腔下pH响应灵敏度的电化学研究 |
| Electrochemical study of pH responsive sensitivity in Fabry–Pérot optical microcavities |
| 投稿时间：2024-03-07 |
| DOI：10.3969/j.issn.1005-5630.202403070039 |
| 中文关键词: 法布里–珀罗光学微腔 振动强耦合 聚苯胺 pH响应灵敏度 电化学 |
| 英文关键词:Fabry-Pérot optical microcavity vibrational strong coupling polyaniline pH responsive sensitivity electrochemistry |
| 基金项目: |
|
| 摘要点击次数: 960 |
| 全文下载次数: 368 |
| 中文摘要: |
| 法布里–珀罗（Fabry–Pérot，F-P）光学微腔基于其振动强耦合效应，在分子能级调控中展现出独特优势。将聚苯胺薄膜集成于F-P微腔中，发现可通过溶液pH的变化来调控聚苯胺的掺杂状态，从而改变其分子振动模式与能级结构，最终实现对微腔光学响应的调制。实验表明，在3 403 cm－1处，腔模与水分子O—H伸缩振动模式发生拉比分裂，导致耦合能级重构，其pH响应灵敏度变化趋势与O—H吸收带特征一致。当系统处于强耦合区时，pH响应灵敏度达到最低（－8 mV/pH）。该研究证实光场–振动模式强耦合可定向调控分子耦合能级，为光控生化反应提供了新机制。 |
| 英文摘要: |
| Fabry–Pérot (F-P) optical microcavities demonstrate unique advantages in molecular energy-level regulation due to their vibrational strong coupling effects. In this study, a polyaniline (PANI) thin film was integrated into an F-P microcavity, where changes in solution pH were found to modulate the doping state of PANI. Thus, its molecular vibrational modes and energy-level structure are altered, which significantly modified the optical response of the microcavity. Experimental results showed that at 3 403 cm－1, Rabi splitting occurred between the cavity mode and the O—H stretching vibrational mode of water molecules, resulting in the reconstruction of coupled energy levels. The pH-dependent sensitivity trend aligned with the characteristic absorption band of the O—H vibration. At the strong coupling regime, the pH response sensitivity reached a minimum value of －8 mV/pH. This work comfirms that the strong coupling between the optical field and molecular vibrational modes enables targeted regulation of coupled energy levels, offering a novel mechanism for optically controlled biochemical reactions. |
| HTML 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
