Control of electromagnetically induced transparency and Fano resonances in a hybrid optomechanical system

Abstract

We study the control of electromagnetically induced transparency and Fano resonances in a hybrid optomechanical system based on Bose-Einstein condensate trapped inside a high finesse Fabry Pérot cavity coupled with two charged nanomechanical resonators. The system is driven by a pump field and probed by a probe field. The nanomechanical resonators are connected to an external bias voltage V1(−V2) and generated electrostatic Coulomb coupling gc. In this study, we show that the electromagnetically induced transparency can be controlled by the s-wave scattering frequency ωsw as well as by the coupling frequencies of the system. Further, studying the effect of Bogoliubov mode, the transparency window splits from double to triple windows. At strong atom-atom interaction, we explain the asymmetric windows' and explain their physical understanding.

Ultraslow light realization using an interacting Bose–Einstein condensate trapped in a shallow optical lattice

“…Besides, it has been shown that hybrid optomechanical systems consisting of atomic systems or BEC may provide more controllability in fast and slow light realization 41 – 47 . Furthermore, the phenomenon of Fano resonance which was observed for the first time in some of the Rydberg spectral atomic lines, can be also observed in optomechanical systems 48 – 50 .…”

Tunable multiwindow magnomechanically induced transparency, Fano resonances, and slow-to-fast light conversion

“…The physical origin of Fano resonance in the systems having optomechanical-like interactions has explained due to the presence of non-resonant interactions. For example, in a standard optomechanical system, if the anti-Stokes process is not resonant with the cavity frequency, asymmetric Fano shapes appear in the spectrum [30][31][32]. In our system, this corresponds to ∆ m1 = ω b , because instead of a cavity mode, magnon mode m 1 is coupled with phonon mode via optomechanical-like interaction.…”

“…4(a). Such asymmetric MIT bands can be related to multiple Fano resonances, emerging frequently in optomechanical systems [30][31][32][33][34]. If we remove the YIG1 and consider the other two couplings g 2 and g mb in the system for ∆ m2 = 0.7ω m , we obtain double Fano resonance in the output spectrum, this is shown in Fig.…”

“…The shape of the Fano resonance is distinctly different than the symmetric resonance curves in the EIT, MIT, optomechanically induced transparency (OMIT) and MMIT windows [14,30]. Fano resonance has observed in the systems in which EIT has reported by a suitable selection of the system parameters [14,[30][31][32][33][34]. The physical origin of Fano resonance in the systems having optomechanical-like interactions has explained due to the presence of non-resonant interactions.…”

Fano resonances and slow light in a nanocavity assisted by metallic nanoparticles‐quantum dot system

“…Recently, optomechanical system (OMS) has been widely researched and reviewed [1–7], which examines the coupling between the photons and phonons based on the radiation pressure interactions. OMS as a macroscopic system is a good plateform to study the interaction among the nanocavity, the mechanical oscillator and other inserted objects such as atoms [8–15], Bose–Einstein condensate (BEC) [16–21], quibit [22–26], Kerr medium [27–30], graphene [31], QD [27, 32]. Many interesting phenomena have been reported, like optical solitons [33], electromagnetically induced absorption [17, 24, 34], optomechanically induced transparency (OMIT) [12, 13, 24, 26, 31–43], optomechanically induced amplification [24, 45], optical bistability [16, 46, 47], sideband effect [48, 49], entanglement [8, 50], four‐wave mixing [10, 51], squeezing [25, 52, 53], ground‐state cooling [54–59], photothermally induced transparency [60], optomechanically induced birefringence and optomechanically induced faraday effect [61].…”