Plasmon–exciton polaritonic emission lifetime dynamics under strong coupling

IF 6.6 2区 物理与天体物理 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Povilas Jurkšaitis, Justina Anulytė, Evita Spalinskaitė, Ernesta Bužavaitė-Vertelienė, Vytautas Žičkus, Dovydas Banevičius, Karolis Kazlauskas, Zigmas Balevičius
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Abstract

In this study, we investigate the contribution of resonant and non-resonant excitation conditions on the polariton decay dynamics of strongly coupled rhodamine 6G (R6G) and surface plasmon polariton (SPP). We showed proof of strong coupling between SPP and R6G exciton from the dispersion relations measured by total internal reflection ellipsometry (TIRE). From these it was determined that the coupling strength reaches g ≈ 200 meV. Further fluorescence methods were employed to demonstrate the emission from the lower polariton branch (LP). The fluorescence lifetime and back focal plane imaging techniques were implemented to study radiative polariton decay, for resonant and non-resonant excitation conditions. Fluorescence decay measurements of plasmonic strong coupling regime showed considerably longer (ps) than expected lifetime values (fs). In our case the measured lifetimes cannot be explained without the influence of additional energy level in emission dynamics, such as incoherent transition from exciton reservoir to lower polaritonic branch. The fundamental understanding of coherent energy exchange dynamics has potential importance for development of quantum optical nanodevices, polaritonic lasers, polariton condensation.
强耦合下等离子体-激子极化激子发射寿命动力学
在这项研究中,我们研究了共振和非共振激励条件对强耦合罗丹明6G (R6G)和表面等离子激元极化子(SPP)的极化子衰变动力学的贡献。利用全内反射椭偏仪(TIRE)测量的色散关系证明了SPP和R6G激子之间的强耦合。由此确定耦合强度达到g≈200 meV。进一步的荧光方法被用来证明从低极化分支(LP)的发射。采用荧光寿命和后焦平面成像技术研究了共振和非共振激发条件下的辐射极化子衰变。等离子体强耦合态的荧光衰减测量显示,其寿命值(ps)比预期寿命值(fs)长得多。在我们的例子中,如果没有发射动力学中额外能级的影响,例如从激子库到低极化分支的非相干跃迁,就无法解释测量的寿命。对相干能量交换动力学的基本认识对量子光学纳米器件、极化激光器、极化子凝聚的发展具有潜在的重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Nanophotonics
Nanophotonics NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
13.50
自引率
6.70%
发文量
358
审稿时长
7 weeks
期刊介绍: Nanophotonics, published in collaboration with Sciencewise, is a prestigious journal that showcases recent international research results, notable advancements in the field, and innovative applications. It is regarded as one of the leading publications in the realm of nanophotonics and encompasses a range of article types including research articles, selectively invited reviews, letters, and perspectives. The journal specifically delves into the study of photon interaction with nano-structures, such as carbon nano-tubes, nano metal particles, nano crystals, semiconductor nano dots, photonic crystals, tissue, and DNA. It offers comprehensive coverage of the most up-to-date discoveries, making it an essential resource for physicists, engineers, and material scientists.
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