The vibronic absorption spectra and exciton dynamics of plasmon-exciton hybrid systems in the regimes ranged from Fano antiresonance to Rabi-like splitting

被引:8
|
作者
Zhang, Bin [1 ,2 ]
Liang, WanZhen [1 ,2 ]
机构
[1] Xiamen Univ, Coll Chem & Chem Engn, Fujian Prov Key Lab Theoret & Computat Chem, State Key Lab Phys Chem Solid Surfaces,Collaborat, Xiamen 361005, Fujian, Peoples R China
[2] Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, Xiamen 361005, Fujian, Peoples R China
来源
JOURNAL OF CHEMICAL PHYSICS | 2020年 / 152卷 / 01期
基金
中国国家自然科学基金;
关键词
RESONANCE ENERGY-TRANSFER; ELECTRON-TRANSFER; INDUCED TRANSPARENCY; QUANTUM-DOT; SPECTROSCOPY; SOLAR; NANOPARTICLES; ENHANCEMENT; ELECTRODYNAMICS; INTERFERENCE;
D O I
10.1063/1.5128848
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The complex interplay between molecules and plasmonic metal nanoparticles (MNPs) presents a set of particular characteristics in absorption/scattering spectra such as excitonic splitting, asymmetric line shapes, plasmon-induced absorption enhancement and transparencies, etc. Although the MNP-molecule systems have been intensively investigated experimentally and theoretically, the construction of a theoretical framework which can produce all the disparate experimental observations and account for the electron-phonon (e-p) coupling is still in progress. Here, we present a theoretical approach which can account for both the plasmon-exciton coupling and the e-p interaction and produce all the spectral line shapes ranging from Fano antiresonance to Rabi splitting by simply tuning the coupling strength or plasmon damping rate. Additionally, we demonstrate the evolution of vibronic spectra and exciton dynamics with the coupling strength, plasmon damping rate, and detuning energy. It is found that the vibronic structures appearing in Rabi-like spectra are worse resolved, wider, and more largely shifted than those appearing in the Fano regime, attributed to the more significant deformation of the molecular vibrational wavepacket in the Rabi-like regime than that in the Fano regime as the molecular e-p interaction increases. The positive/negative value of detuning energy can induce different degrees of the vibrational wavepacket deformation and subsequently a different effect on the spectra in different coupling regimes.
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页数:13
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