论文标题
在负原子培养基的负原子培养基中，弱地表层极化子的相干扩增和激光
Coherent amplification and lasing of weak surface-plasmon polaritons in a negative-index metamaterial with a resonant atomic medium
论文作者
论文摘要
表面等离子体极化子（SPP）激光需要种群反转，效率低下，光谱特性较差。我们为量子等离子体波导开发了无反转概念，该量子是利用辐射的单向超级SPP发射以产生强烈的相干表面等离子体束。我们的方案包括一个在超低损耗负指数超材料〜（NIMM）层的无损介电介质中的共鸣的冷原子介质。我们建议在原子培养基和NIMM层界面内产生等离子场的单向超级辐射，并通过在超级级别SPP波和耦合激光场之间引入相匹配来实现扩增的SPP。我们还建立了弱调制等离子场和原子集合的集体振荡之间的参数共振，从而抑制了稳定放大方向性极化模式的脱谐。我们的方法结合了原子培养基的量子增益，以获得足够的条件，以相干放大超级spp波，我们探索了这种方法，以使原子介质与弱极性波的量子动力学结合。我们的波导构型充当表面等离子体激光器和量子等离子晶体管，并为设计可控的纳米尺度激光器打开了量子和纳米光子应用的前景。
Surface plasmon polaritons (SPPs) lasing requires population inversion, it is inefficient and possesses poor spectral properties. We develop an inversion-less concept for a quantum plasmonic waveguide that exploits unidirectional superradiant SPP emission of radiation to produce intense coherent surface plasmon beams. Our scheme includes a resonantly driven cold atomic medium in a lossless dielectric situated above an ultra-low loss negative index metamaterial~(NIMM) layer. We propose generating unidirectional superradiant radiation of the plasmonic field within an atomic medium and a NIMM layer interface and achieve amplified SPPs by introducing phase-match between the superradiant SPP wave and coupled laser fields. We also establish a parametric resonance between the weak modulated plasmonic field and the collective oscillations of the atomic ensemble, thereby suppressing decoherence of the stably amplified directional polaritonic mode. Our method incorporates the quantum gain of the atomic medium to obtain sufficient conditions for coherent amplification of superradiant SPP waves, and we explore this method to quantum dynamics of the atomic medium being coupled with the weak polaritonic waves. Our waveguide configuration acts as a surface plasmon laser and quantum plasmonic transistor and opens prospects for designing controllable nano-scale lasers for quantum and nano-photonic applications.
