Efficient Biexciton Preparation in a Quantum Dot—Metal Nanoparticle System Using On-Off Pulses

Abstract

We consider a hybrid nanostructure composed by semiconductor quantum dot coupled to a metallic nanoparticle and investigate the efficient creation of biexciton state in the quantum dot, when starting from the ground state and using linearly polarized laser pulses with on-off modulation. With numerical simulations of the coupled system density matrix equations, we show that a simple on-off-on pulse-sequence, previously derived for the case of an isolated quantum dot, can efficiently prepare the biexciton state even in the presence of the nanoparticle, for various interparticle distances and biexciton energy shifts. The pulse durations in the sequence are obtained from the solution of a transcendental equation.

Simulating action-2D electronic spectroscopy of quantum dots: insights on the exciton and biexciton interplay from detection-mode and time-gating

“…Amongst the other important applications, excitons in QD materials are candidate substrates for quantum technologies, including quantum computing. 68,69 In this context, preparation and manipulation of exciton states can be achieved by optical pulses [70][71][72][73] and the collinear geometry facilitates rapid data acquisition, making A-2DES a valuable test-bed for quantum information processing coupled with photocurrent readout. 74 To assist developments in this direction, numerical simulation protocols going beyond the perturbative response function are needed.…”

Advanced Nanomaterials for Quantum Technology, Sensor and Health Therapy Applications

“…In this Special Issue, there are research articles that focus on the use of nanomaterials for quantum technology applications [1][2][3][4][5][6][7], nanomaterials for health science [8][9][10] and nanomaterials for solar cells [11].…”

Non-Linear Optical Properties of Biexciton in Ellipsoidal Quantum Dot

“…Numerous works are devoted to the investigation of lowest-state or ground properties of excitons and biexcitons [13][14][15][16][17][18][19]. For example, in [13] the authors have investigated, theoretically and experimentally, the excitonic absorption spectrum, and in [15] the authors have considered the impact of excess electron occupation on the exciton's optical properties.…”

“…For example, in [13] the authors have investigated, theoretically and experimentally, the excitonic absorption spectrum, and in [15] the authors have considered the impact of excess electron occupation on the exciton's optical properties. Additionally, in [17] the hybrid nanostructure model has been discussed for the efficient creation of the biexciton state.…”