We suggest an optomechanical system to study the manipulation of the Goos-Hänchen shift (GHS) in the reflected light. Our proposed model consists of a cavity with two plates of mirrors where one is movable(reflecting) while the other is fixed (partially reflecting). An external plate of dielectric is attached for the generation of Casimir force in the system. A Casimir force can affect the output probe field (OPF) that leads to the manipulation of optomechanically induced transparency (OMIT) ( Sci. Rep. 6 , 27 102 (2016)). Remarkably, we explore the magnitude enhancement of the GHS in the presence of Casimir force in the system. Our theoretical model can provide the possibility in the real experiment and can study the magnitude enhancement of the GHS in the reflected light.

We investigate magneto-optical rotation (MOR) of surface plasmon polaritons (SPPs) at the interface of a metal and a four-level atomic system. The MOR of SPPs can be controlled and modified with the intensity and frequency of the applied fields. We show the birefringence enhancement of the weak probe fields propagating through the atomic medium in the presence of the static magnetic field. The external magnetic field has a vital role in the generation and control over the MOR of SPPs. The MOR completely stops when either the external magnetic field or the probe field or both are tuned to resonance. A pretty behavior of MOR of SPPs is observed for a specific set of control field frequency. The enhanced MOR of SPP has significant applications in atomic spectroscopy, optical communication, nano-photonics, optical switches, and precise measurement.

The adsorption characteristics of some environmental gas molecules (HF, CO, CO₂, SO₂, H₂S, NH₃, NO and NO₂) on the surface of a CuBr monolayer have been studied using DFT+U calculations with Grimme scheme DFT-D2.