论文标题
WS2中光学鲜明效应和共振谐波产生之间的量子干扰
Quantum interference between the optical Stark effect and resonant harmonic generation in WS2
论文作者
论文摘要
应用的场可以通过Stark效应进行共振转移来调节光学信号。光学鲜明效应（OSE）在材料的透明区域中使用超快光，以脉冲持续时间或系统相干性限制速度的谐振。在这封信中，我们使用具有多种形态的WS2的基态激子过渡研究了谐振光学谐波产生（OHG）的OSE。探头是第二或第三次谐波发射的多维泵谐波测量值，不仅揭示了与WS2激子共有的大型光学敏感性相称的大型鲜明的变化，而且行为比简单的治疗预测更为复杂。我们展示了由泵和OHG基本场之间连贯的光子交换带来的鲜明效应的新表现，可以强烈增强或抑制OHG。
An applied field can modulate optical signals by resonance shifting via the Stark effect. The optical Stark effect (OSE) uses ultrafast light in the transparency region of a material to shift resonances with speeds limited by the pulse duration or system coherence. In this Letter we investigate the OSE in resonant optical harmonic generation (OHG) using the ground state exciton transition of WS2 with a variety of morphologies. Multidimensional pump-harmonic-probe measurements, in which the probe is second- or third-harmonic emission, reveal not only large Stark shifts that are commensurate with the large optical susceptibilities common to WS2 excitons, but also behaviors more complex than simple OSE treatments predict. We show how a new manifestation of the Stark Effect, brought forth by coherent photon exchange between the pump and OHG fundamental fields, can strongly enhance or suppress OHG.
