Andrianov E S, Baranov D G, Pukhov A A, Dorofeenko A V, Vinogradov A P, Lisyansky A A
Moscow Institute of Physics and Technology, Dolgoprudniy 141700, Moscow Region, Russia.
Opt Express. 2013 Jun 3;21(11):13467-78. doi: 10.1364/OE.21.013467.
We show that in plasmonic systems, exact loss compensation can be achieved with the help of spasers pumped over a wide range of pumping values both below and above the spasing threshold. We demonstrate that the difference between spaser operation below and above the spasing threshold vanishes, when the spaser is synchronized by an external field. As the spasing threshold loses its significance, a new pumping threshold, the threshold of loss compensation, arises. Below this threshold, which is smaller than the spasing threshold, compensation is impossible at any frequency of the external field.
我们表明，在等离子体系统中，借助于在低于和高于激射阈值的广泛泵浦值范围内泵浦的受激辐射放大的自发辐射源（spasers），可以实现精确的损耗补偿。我们证明，当受激辐射放大的自发辐射源由外部场同步时，低于和高于激射阈值的受激辐射放大的自发辐射源操作之间的差异消失。随着激射阈值失去其重要性，出现了一个新的泵浦阈值，即损耗补偿阈值。低于这个小于激射阈值的阈值，在外部场的任何频率下都无法进行补偿。
