Controllable fast light in quantum dot molecules assisted hybrid optomechanical system. Issue 17 (10th June 2022)

• Record Type: Journal Article
• Authors: Ghaffar, Ammal Abdul; Khan, Muhammad Aslam; Niaz, Shanawer; Khan, Farooq; Jamil, Muhammad Ashfaq; Ramay, Shahid M.
• Is Part Of: International journal of quantum chemistry. Volume 122:Issue 17(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-06-10
• Subjects: fast light -- mechanical resonator -- optomechanics -- three‐level quantum dot molecules (QDMs) -- tunneling strength; Quantum chemistry -- Periodicals; 541.28
• DOI: 10.1002/qua.26955
• Languages: English
• ISSNs: 0020-7608

Abstract

Abstract: We investigate the superluminal effect of transmitted probe field in three‐level quantum dot molecules (QDMs) assisted optomechanical system which consist of mechanical resonator. We show that the superluminal behavior of transmitted probe field can be controlled by changing the tunneling strength and number of QDMs inside the cavity. Furthermore, it is shown that in the absence of tunneling strength, the transmitted probe field shows the fast light effect and by increasing the number of QDMs, the enhancement in superluminal behavior is decreased and converts into slow light. While, in the presence of the tunneling strength, with the increase of the number of QDMs the superluminal behavior of transmitted field is obtained at smaller detuning frequency. The influence of tunneling strength and number of QDMs on superluminal part of the transmitted probe field is quite useful in optical memory, optical buffers, and quantum information processing. Abstract : An optomechanical system with QDMs placed at the center of the cavity between a fixed mirror and an oscillating mirror. A strong pump laser εl (frequency ωl) and a weak probe laser εp (frequency ωp) are injected into the cavity from the left fixed mirror. Inserted energy levels are of QDMs.