Effect of second-order nonlinearity on quantum coherent oscillations in a quantum dot embedded in a doubly resonant-semiconductor micro-cavity

Abstract

The recent developments in quantum technology physics have shown tremendous progress in the storage,processing and transfer of quantum information using quantum bits (Qubits) [1][2][3].Quantum coherence which is a necessary requirement for realistic quantum communication system is extremely fragile and can be destroyed by interaction with the environment. Semiconductor quantum dots (QDs) embedded in micro-cavity have recently emerged as an attractive candidate for the implementation of quantum computing platforms [4][5][6][7][8]. Instead of the usual two-level real atoms, excitons in the QDs are considered as an alternative two level systems characterized by strong exciton-phonon interactions [9][10][11][12]. For practical implementation of quantum information processing based on QDs, it is important to minimize the influence of lattice vibrations which tends to destroy their coherence. Thus it is important to take into account exciton-phonon interactions in the study of quantum-dot cavity system. Experimental observation of vacuum Rabi Oscillations in atomic [13] as well as in solid state systems [14-16] provides evidence for strong coupling regime in micro cavity systems. Thus QDs embedded in semiconductor micro-cavity have emerged as an exciting platform to study cavity QED [17][18][19].Recently proposals have been put forward to use nano structured photonic nanocavities made of χ (2) nonlinear materials as prospectives devices for application in quantum information processing, quantum logic gates and all optical switches [20,21].One of the main aims of working with such systems is to have a scalable integrated quantum photonic technology with the probability to work at telecommunication wavelengths. In this paper, we seek to theoretically study the quantum oscillations in a coherently driven quantum dot-cavity system in the presence of a χ (2) nonlinear substrate and strong exciton-phonon interactions.

Controllable bistable optical switch and normal mode splitting in hybrid optomechanical semiconductor microcavity containing single quantum dot driven by amplitude modulated field

“…The con nement of light along the x-direction and the y-z plane is provided by DBR and air-guiding dielectric respectively. There are some known techniques by which the con nement of light along the longitudinal and transverse direction in the DBR can be achieved [29][30][31][32]. The re ectance of the DBR is proportional to number of pairs and the difference between high and low index pairs [33].…”

Nonlinear optical response properties of a quantum dot embedded in a semiconductor microcavity: possible applications in quantum communication platforms

“…Such solid state based optomechanical systems can be realized using distributed Bragg reflectors (DBRs). Semiconductor quantum dots(QDs) have emerged as a new class of hybrid quantum devices which are confined within the optical micro-cavities owing to their large density of states and high tunability [42][43][44][45][46][47][48][49][50].…”