arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2211.16613physics.chem-ph
收藏

激发态振动极化激元介导的紫外/可见光-红外光子下转换

UV/vis-to-IR Photonic Down Conversion Mediated by Excited State Vibrational Polaritons

Connor K. Terry Weatherly, Justin Provazza, Emily A. Weiss, Roel Tempelaar

摘要:

这项工作提出了一种新的光物理现象,即紫外/可见光激发的分子涉及的Franck-Condon(FC)主动振动产生红外(IR)发射的强耦合到一个光学腔。由此产生的UV/vis到IR光子下转换过程是由电子激发态势中的振动极化激元介导的。结果表明,只有当分子在激发态具有非零的FC活性和IR活性时,才能通过UV/vis激发形成这种激发态振动极化激元(ESVP).密度泛函理论计算表明,有效地确定一个候选分子,1-芘乙酸(PAA),与此属性和ESVP的动力学建模使用截断维格纳近似。总的来说,这项工作提出了一个新的途径极化激元化学的激发态动力学,由光激发,振动极化激元的形成的影响。与此同时,光子下转换在激发态振动的感测和量子转换方案中都是潜在有用的。

英文摘要:

This work proposes a new photophysical phenomenon whereby UV/vis excitation of a molecule involving a Franck-Condon (FC) active vibration yields infrared (IR) emission by strong coupling to an optical cavity. The resulting UV/vis-to-IR photonic down conversion process is mediated by vibrational polaritons in the electronic excited state potential. It is shown that the formation of such excited state vibrational polaritons (ESVP) via UV/vis excitation only occurs with molecules having vibrational modes with both a non-zero FC activity and IR activity in the excited state. Density functional theory calculations are shown to effectively identify a candidate molecule, 1-Pyreneacetic acid (PAA), with this property and the dynamics of ESVP are modeled using the truncated Wigner approximation. Overall, this work presents a new avenue of polariton chemistry where excited state dynamics, driven by photoexcitation, are influenced by the formation of vibrational polaritons. Along with this, the photonic down conversion is potentially useful in both the sensing of excited state vibrations and in quantum transduction schemes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑