Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran.
Department of Physics, Shahid Beheshti University, Tehran, Iran.
Sci Rep. 2023 Mar 4;13(1):3659. doi: 10.1038/s41598-023-30573-4.
We investigate the realization of the phenomenon of optomechanically induced gain in a hybrid optomechanical system consisting of an interacting Bose-Einstein condensate trapped inside the optical lattice of a cavity which is generated by an external coupling laser tuned to the red sideband of the cavity. It is shown that the system behaves as an optical transistor while the cavity is exposed to a weak input optical signal which can be amplified considerably in the cavity output if the system is in the unresolved sideband regime. Interestingly, the system has the capability to switch from the resolved to unresolved sideband regime by controlling the s-wave scattering frequency of atomic collisions. We show that the system gain can be enhanced considerably by controlling the s-wave scattering frequency as well as the coupling laser intensity while the system remains in the stable regime. Based on our obtained results, the input signal can be amplified more than 100 million percent in the system output which is much larger than those already reported in the previously proposed similar schemes.
我们研究了混合光机械系统中光机械诱导增益现象的实现，该系统由囚禁在腔的光学晶格中的相互作用玻色-爱因斯坦凝聚体组成，腔由调谐到腔的红色边带的外部耦合激光产生。结果表明，当腔暴露于弱输入光信号时，系统表现为光晶体管，如果系统处于未解析边带模式，则可以在腔输出中大大放大该信号。有趣的是，通过控制原子碰撞的 s 波散射频率，系统有能力从解析边带模式切换到未解析边带模式。我们表明，通过控制 s 波散射频率以及耦合激光强度，可以在系统保持稳定状态的同时，显著增强系统增益。基于我们获得的结果，输入信号可以在系统输出中放大超过 10000 倍，这比以前提出的类似方案中已经报道的要大得多。
