Strong photon-exciton coupling in a metal microcavity

• Main Authors: Yan-Ting Chen, 陳衍廷
• Other Authors: Jui-Fen Chang
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/45279016997422700409

碩士 === 國立中央大學 === 光電科學與工程學系 === 101 === In this study, we demonstrate the phenomenon of light and matter coupling with microcavity and organic exciton. The J-aggregate structure is arranged by molecular dipole of organic material, and this arrangement is not zero dipole. The energy transfer between exciton and photon is efficient because the exciton lifetime is short. We have discussed physical structure and optical properties in PDAC/DEDOC J-aggregate films possessed the high absorption coefficient and the nanoscale thickness. Using these phenomena we can manufacture the optical element with light-matter coupling property. We designed the ideal microcavity using Hamiltonian amplification matrix model and multilayer matrix model in order to predict the photon-exciton coupling. To observe Rabi splitting energy we insert the J-aggregate films into λ/2 metal microcavity structure. The energy of microcavity structure is large than the dielectric resonator. The upper branch (UB) and the lower branch (LB) polarton dispersion can be measured by multi-angle reflection spectrum, respectively. The energy transfer between exciton and photon is intense while separated branch close each other at certain angle. We call this energy difference between separated branch as Rabi splitting energy. Finally, we verify the linear relation between thickness of active layer and Rabi splitting energy. The existence of half-light and half-matter polariton in our element can be measured angle resolved fluorescence spectrum.