Akhtar Muhammad Shaban, Naweed Ahmer
Opt Lett. 2024 Oct 1;49(19):5667-5670. doi: 10.1364/OL.538891.
We describe the occurrence of electromagnetically induced transparency (EIT), electromagnetically induced absorption (EIA), and Fano resonance due to time-controlled discontinuities in the refractive index of a medium, which leads to the formation of a double-cavity system inside a temporal photonic crystal. The temporal resonances partly resemble the optical resonances arising in conventional microcavities, since the amplified temporal EIA displays distinct spectral characteristics. Although an amplified EIT does not occur, a strongly amplified EIA affects the behavior of EIT as well. Besides modifying the temporal resonances via coupled-cavity interactions, we reveal refractive index-controlled temporal resonances. This computational study paves the way to probe the temporally driven coherent phenomena of EIT and EIA with potential applications such as slow-light, amplified fast-light, amplified ultranarrow bandwidth optical filters, and multicavity systems.
我们描述了由于介质折射率的时间控制不连续性而产生的电磁诱导透明（EIT）、电磁诱导吸收（EIA）和法诺共振，这导致在时间光子晶体内形成双腔系统。时间共振部分类似于传统微腔中产生的光学共振，因为放大的时间EIA显示出独特的光谱特性。虽然不会出现放大的EIT，但强烈放大的EIA也会影响EIT的行为。除了通过耦合腔相互作用修改时间共振外，我们还揭示了折射率控制的时间共振。这项计算研究为探测EIT和EIA的时间驱动相干现象铺平了道路，这些现象具有诸如慢光、放大快光、放大超窄带宽光学滤波器和多腔系统等潜在应用。
