标题： 增益辅助等离激元透明中的激光振荡条件和群延迟控制 显示英文标题

标题： Lasing oscillation condition and group delay control in gain-assisted plasmon-induced transparency

摘要： 具有两个失谐谐振器的增益辅助等离子体波导在等离子体诱导透明窗口中被研究。 相位图被用于研究不同增益系数和两个谐振器的频率失谐下的功率透射率和群延迟。 激光振荡条件下的增益系数被分析地表明与频率失谐呈二次关系。 在低于激光阈值的放大区域，谱表明不仅存在大的群延迟，还有高透射率和窄线宽。 这与损耗补偿区域和无源情况中的结果形成对比，在那些情况下，线宽和峰值透射率之间总是存在权衡。 显示英文摘要

摘要： A gain-assisted plasmonic waveguide with two detuned resonators is investigated in the plasmon-induced transparency window. Phase map is employed to study power transmittance and group delay for varying gain coefficients and frequency detunings of the two resonators. The gain coefficient for lasing oscillation condition is analytically shown to vary quadratically with the frequency detuning. In the amplification regime below the lasing threshold, the spectrum implies not only large group delay, but also high transmittance and narrow linewidth. This is in contrast to those in the loss-compensation regime and the passive case in which there always exists a trade-off between the linewidth and the peak transmittance.