Molecular Packing-Dependent Exciton and Polariton Dynamics in Anthradithiophene Organic Crystals
Molecular Packing-Dependent Exciton and Polariton Dynamics in Anthradithiophene Organic Crystals
复制标题
蒽并噻吩有机晶体中分子堆积相关的激子和极化子动力学
作者：
J. Schenck;G. Giesbers;A. Kannegulla;Li;J. Anthony;O. Ostroverkhova
采用Holstein型哈密顿量研究了两种含氟蒽并噻吩衍生物diF TES-ADT和diF TDMS-ADT在晶相中的偏振相关吸收光谱。对于这两种分子，最低能量吸收的主要贡献被认为是S_0-S_1激子跃迁扰动的分子间耦合的15 meV的TES和TDMS。此外，还分析了晶体置于由两个金属反射镜构成的光学微腔内时的吸收光谱。空腔的主要吸收峰是由最低能量的S_0-S_1跃迁引起的。
Polarization-dependent absorption spectra of two functionalized derivatives of fluorinated anthradithiophene, diF TES-ADT and diF TDMS-ADT, were studied in the crystal phase using a Holstein-like Hamiltonian. For both molecules, the primary contribution to the lowest energy absorption was found to be the S_0-S_1 excitonic transition perturbed by an intermolecular coupling of 15 meV for both TES and TDMS. A secondary contribution, consistent with that from charge-transfer states, was also found. Additionally, absorption spectra were analysed when crystals were placed inside of optical microcavities formed by two metal mirrors. Cavities exhibited a primary absorption peak determined to be an enhanced absorption from the lowest-energy S_0-S_1 transition.