表面等离子激元与CdSe/ZnS量子点的能量交换
Energy exchange between surface plasmon polaritons and CdSe/ZnS quantum dots
摘要：
在波导耦合的Ag/Si 3 N4/Au结构和CdSe/ZnS量子点（QD）发光体中激发的表面等离子体激元（SPPs）之间存在能量交换。将量子点分散液涂敷在Ag/Si 3 N4/Au纳米结构表面，在多层结构表面激发表面等离子体共振（SPR），利用固定探测器泵浦探测光谱法监测量子点的光致发光（PL）随倏逝电场的变化。我们观察到PL发射波长（对应于4-5毫电子伏）与伴随的电场诱导淬火（高达50%）的发射相对较大的位移。在倏逝场的影响下，PL发射峰分裂成对应于两个频率的两个分量（拉比分裂）。计算机模拟被用来了解拉比分裂应该发生的条件。
英文摘要：
Evidence is presented for energy exchange between surface plasmon polaritons (SPPs) excited in waveguide-coupled Ag/Si3N4/Au structures and CdSe/ZnS quantum dot (QD) emitters. The QD dispersion is coated on the surface of Ag/Si3N4/Au nanostructure, surface plasmon resonance (SPR) is excited on surface of multilayered structure and the photoluminescence (PL) emission by the QDs is monitored as a function of the evanescent electric field by using fixed-detector pump-probe spectroscopy. We observe relatively large shift in the PL emission wavelength (corresponding to 4-5 meV) with accompanying electric field induced quenching (up to 50%) of the emission. Under the influence of the evanescent field, the PL emission peak splits into two components corresponding to two frequencies (Rabi splitting). Computer simulations are used to understand conditions under which Rabi splitting should occur.
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