Entangled plasmon generation in nonlinear spaser system under the action of external magnetic field

Abstract

The present paper theoretically investigates features of quantum dynamics for localized plasmons in three-particle or four-particle spaser systems consisting of metal nanoparticles and semiconductor quantum dots. In the framework of the mean field approximation, the conditions for the observation of stable stationary regimes for single-particle plasmons in spaser systems are revealed, and realization of these regimes is discussed. The strong dipole-dipole interaction between adjacent nanoparticles for the four-particle spaser system is investigated. We show that this interaction can lead to the decreasing of the autocorrelation function values for plasmons. The generation of entangled plasmons in a three-particle spaser system with nonlinear plasmon-exciton interaction is predicted. For the first time the use of an external magnetic field is proposed for control of the cross-correlation between plasmons in the three-particle spaser system.

Hybrid Schemes for Excitation of Collective Resonances with Surface Plasmon Polaritons in Arrays of Quantum Dots in the Proximity of Graphene

“…2 , and 44 ≡̄4 4 , we obtained a system of equations for the density matrix elements from (10) and (11) and then added an equation on the signal field. Thus, the self-consistent system of equations for the density matrix elements and the Rabi frequency g for the signal SPP mode has the following form:̄1…”

“…[1] Nanosystems supporting strong emitter-field coupling are the basis for the creation of highly efficient nearfield light [2] and SPP sources, [3] nanoparticle lattices for directional scattering, [4] energy transfer devices, [5] nano-antennas, [6] highly-sensitive sensors, [7,8] and entangled systems. [9,10] Such systems feature a significant increase in the local density of optical states with the imposition of boundary conditions on the nanoscale. [11] A prime example is quantum electrodynamics DOI: 10.1002/lpor.202000237 (QED) with a single atom in a microresonator, [12] where a strong coupling condition is satisfied due to the dominance of the induced rate g for re-emission of photons into the cavity mode over the spontaneous decay rate of the emitter ij and the decay rate of the intracavity field s .…”

“…[5] The essence of these hybrid schemes lies in the optically induced strong modification of the population imbalances and polarizations of emitters in the proximity of graphene, allowing the realization of coherent plasmonic phenomena [21,22] on the nanoscale. In special cases, when the frequency of two-photon transition in QD is equal to the doubled frequency of the surface plasmon resonance, [10,23] one should expect a sharp enhancement of the nonlinear effects that are a basis for the realization of all-optical switching and routing.…”

“…[ 1 ] Nanosystems supporting strong emitter‐field coupling are the basis for the creation of highly efficient near‐field light [ 2 ] and SPP sources, [ 3 ] nanoparticle lattices for directional scattering, [ 4 ] energy transfer devices, [ 5 ] nano‐antennas, [ 6 ] highly‐sensitive sensors, [ 7,8 ] and entangled systems. [ 9,10 ]…”

Excitonic States and Related Optical Susceptibility in InN/AlN Quantum Well Under the Effects of the Well Size and Impurity Position

“…Recently, this latter is one of the most techniques used with great accuracy to identify exciton states as well as their radiative and nonradiative broadenings compared to the PL spectra. To describe the exciton states in QW, several papers are reported based on the time-independent Schrödinger equation solving using different approaches such: the perturbative method [24], the Ritzvariational method [12]- [14], the shooting method [25] and the Hartree formalism with a recently developed numerical method (Potential Morphing Method). Recently, Belov [26] has used the finite difference method which allows him to obtain exciton states and binding energies for a wide domain of well widths considering the discontinuities of the material parameters at the square QW interfaces.…”