Superluminal Pulse Propagation in a One-Sided Nanomechanical Cavity System

Abstract

We investigate the propagation of a pulse field in an optomechanical system. We examine the question of advance of the pulse under the conditions of electromagnetically induced transparency in the mechanical system contained in a high quality cavity. We show that the group delay can be controlled by the power of the coupling field. The time delay is negative which corresponds to superluminal light when there is a strong coupling between the nano-oscillator and the cavity.

Force-induced transparency and conversion between slow and fast light in optomechanics

“…Since the probe transmission ε depends on both the pump power and the external force in our approach, the group velocity delay τ can be tuned by both the power of the pump light and the external force, which are different from previous ideas with τ modified only by the pump power [29][30][31][32]. To show this, we plot τ as a func-tion of the force around the detuning of δ = ±ω m in Fig.…”

“…So we wonder if the OMIT, with analogy to the EIT, could also work for producing slow/fast light and even beyond. In fact, there have been publications [27][28][29][30][31][32][33] for slow and fast light effects associated with the COM using similar behavior to those with multi-level atoms. As shown below, however, we will go for a further step with the COM by presenting an experimentally feasible proposal for a force-induced trans- * changjianqi@gmail.com † mangfeng@wipm.ac.cn parency with slow/fast light and a conversion between the slow and fast lights.…”

Rate Coefficients of Ar+ Ions in Ar/CF4 Mixtures

“…The flux and bulk drift velocities [19] for Ar + in Ar/CF 4 as a function of E/N are given in Fig. 3.…”

Tunable fast and slow light in a hybrid optomechanical system

“…In view of many potential applications of fast and slow light propagation, a question of interest is whether one can have a controlling parameter in a single set-up (experiment) for switching from superluminal to subluminal propagation or vice versa. However, previous studies show that single ended cavities allow only superluminal propagation [45], whereas hybrid BEC [46], quadratically coupled [47], and even two-mode optomechanical systems [48] only allow slow light propagation. Furthermore, it is reported [49] that, slow light in a double ended cavity occurs in the transmitted probe field, whereas the fast light effect takes place in the reflected field.…”

“…Significant progress has been made in the investigation of various characteristics of optomechanics, such as quantum entanglement [35], quantum ground-state cooling [36], squeezing [30,37], dynamical localization [38], gravitational wave detection [39], EIT [7,40], Fano resonances [7,8] and classical dynamics [28,41]. Fast and slow light have also been observed in optomechanical systems [42][43][44][45][46][47][48][49], whose smaller dimensions and normal environmental conditions have paved the way towards real applications, such as telecommunication, interferometry, quantum-optomechanical memory and classical signal processing applications [50,51]. In view of many potential applications of fast and slow light propagation, a question of interest is whether one can have a controlling parameter in a single set-up (experiment) for switching from superluminal to subluminal propagation or vice versa.…”