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Active Tuning of Strong Coupling States between Dye Excitons and Localized Surface Plasmons via Electrochemical Potential Control
ACS Photonics ( IF 6.5 ) Pub Date : 2018-01-07 00:00:00 , DOI: 10.1021/acsphotonics.7b00841 Fumiya Kato 1 , Hiro Minamimoto 1 , Fumika Nagasawa 1 , Yuko S. Yamamoto 2 , Tamitake Itoh 2 , Kei Murakoshi 1
ACS Photonics ( IF 6.5 ) Pub Date : 2018-01-07 00:00:00 , DOI: 10.1021/acsphotonics.7b00841 Fumiya Kato 1 , Hiro Minamimoto 1 , Fumika Nagasawa 1 , Yuko S. Yamamoto 2 , Tamitake Itoh 2 , Kei Murakoshi 1
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Here we report the tuning of a number of excited dye molecules that were strongly coupled with the localized surface plasmons (LSPs) of Au nanostructures by electrochemical potential control. Using the redox-state-tuned dye molecules and several types of metal nanostructures with distinct LSP energies, active control of the high coupling strength was achieved via an electrochemical potential-based control method. One interesting finding of the present work is that the parabolic behavior of the coupling strength in the range between 0.10 and 0.27 eV is dependent on the electrochemical potential; this has not been observed previously. Anticrossing plots showing the energies of the upper and lower states of the coupling to the LSP energy suggest that the number of dye molecules contained in the cavity-confined LSP field is controlled not only by the redox states of the dye molecules but also by the interactions between the dyes and the metal surfaces. The present finding provides a novel route to control light–matter interactions regarding the energy of electrons in metals and molecules, defined by absolute potential, i.e., electrochemical potential.
中文翻译：
通过电化学电势控制主动调节染料激子与局部表面等离激元之间的强耦合状态
在这里，我们报告通过电化学势能控制与纳米金结构的局部表面等离激元（LSP）强烈耦合的许多激发染料分子的调谐。使用基于氧化还原态的染料分子和具有不同LSP能量的几种类型的金属纳米结构，可通过基于电化学势的控制方法实现对高偶联强度的主动控制。本工作的一个有趣发现是，耦合强度在0.10和0.27 eV之间的抛物线行为取决于电化学势。这以前没有观察到。反交叉图显示了与LSP能量耦合的上，下状态的能量，表明腔约束LSP场中包含的染料分子数量不仅受染料分子的氧化还原态控制，还受相互作用的控制在染料和金属表面之间。本发现提供了一种控制光与物质相互作用的新颖途径，该相互作用涉及由绝对电势（即电化学电势）定义的金属和分子中电子的能量。
更新日期：2018-01-07
中文翻译：
通过电化学电势控制主动调节染料激子与局部表面等离激元之间的强耦合状态
在这里，我们报告通过电化学势能控制与纳米金结构的局部表面等离激元（LSP）强烈耦合的许多激发染料分子的调谐。使用基于氧化还原态的染料分子和具有不同LSP能量的几种类型的金属纳米结构，可通过基于电化学势的控制方法实现对高偶联强度的主动控制。本工作的一个有趣发现是，耦合强度在0.10和0.27 eV之间的抛物线行为取决于电化学势。这以前没有观察到。反交叉图显示了与LSP能量耦合的上，下状态的能量，表明腔约束LSP场中包含的染料分子数量不仅受染料分子的氧化还原态控制，还受相互作用的控制在染料和金属表面之间。本发现提供了一种控制光与物质相互作用的新颖途径，该相互作用涉及由绝对电势（即电化学电势）定义的金属和分子中电子的能量。
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