arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2103.08670quant-ph
收藏

等离子体共振腔中强腔耦合和超强光机耦合下单分子的共振拉曼散射:声子修饰极化激元

Resonant Raman scattering of single molecules under strong cavity coupling and ultrastrong optomechanical coupling in plasmonic resonators: phonon-dressed polaritons

Stephen Hughes, Alessio Settineri, Salvatore Savasta, Franco Nori

摘要:

等离子体二聚体腔可以诱导极端电场热点,允许人们使用拉曼型光谱在单个振动分子上访问超强耦合制度。使用广义主方程,我们研究共振拉曼散射在腔QED的强耦合制度,当也在振动的超强耦合制度,导致“声子修饰极化激元”。主方程严格包括腔和振动自由度的光谱浴,以及一个纯粹的退相浴的共振两级系统,这起着重要的作用。采用现实的金二聚体腔模式的参数,我们调查的发射光谱在几个特征强耦合制度,导致非常丰富的光谱共振由于声子修改的极化激元状态和浴诱导的共振的相互作用。我们还明确地表明,在这些量子非线性制度的标准主方程的失败。

英文摘要:

Plasmonic dimer cavities can induce extreme electric-field hot spots that allow one to access ultrastrong coupling regimes using Raman-type spectroscopy on single vibrating molecules. Using a generalized master equation, we study resonant Raman scattering in the strong coupling regime of cavity-QED, when also in the vibrational ultrastrong coupling regime, leading to "phonon-dressed polaritons". The master equation rigorously includes spectral baths for the cavity and vibrational degrees of freedom, as well as a pure dephasing bath for the resonant two-level system, which play a significant role. Employing realistic parameters for gold dimer cavity modes, we investigate the emission spectra in several characteristic strong-coupling regimes, leading to extremely rich spectral resonances due to an interplay of phonon-modified polariton states and bath-induced resonances. We also show explicitly the failure of the standard master equation in these quantum nonlinear regimes.

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。

↑