Ultrafast single-electron transfer in coupled quantum dots driven by a few-cycle chirped pulse

Abstract

We theoretically study the ultrafast transfer of a single electron between the ground states of a coupled double quantum dot (QD) structure driven by a nonlinear chirped few-cycle laser pulse. A time-dependent Schr€ odinger equation without the rotating wave approximation is solved numerically. We demonstrate numerically the possibility to have a complete transfer of a single electron by choosing appropriate values of chirped rate parameters and the intensity of the pulse. Even in the presence of the spontaneous emission and dephasing processes of the QD system, high-efficiency coherent transfer of a single electron can be obtained in a wide range of the pulse parameters. Our results illustrate the potential to utilize few-cycle pulses for the excitation in coupled quantum dot systems through the nonlinear chirp parameter control, as well as a guidance in the design of experimental implementation. V

Vertical Ionization Energies of Free Radicals and Electron Detachment Energies of Their Anions: A Comparison of Direct and Indirect Methods Versus Experiment

“…The relevance of having accurate information on these properties for atoms and molecules goes further than their gas-phase ionic chemistry. In fact, they are key aspects of any chemical event involving electron transfers (i.e., redox reactions) and are pertinent in semiconductor chemistry, , quantum dots, , interstellar chemistry, − oxidative stress, − and antioxidant protection. − Therefore, it is evident that accurate experimental measurements, or theoretical estimations, of these energies represent an important task with implications for many chemical fields.…”

Manipulation of tunneling induced transparency windows and optical switching features in fivefold quantum dot molecules

“…Besides atomic systems, theoretical and experimental studies on optical properties of semiconductor quantum wells (QWs) and quantum dots (QDs) [23][24][25][26][27][28][29][30][31] have become an interesting topic in the recent years. Being easily controllable in size and in the energy levels spacing, quantum dot molecules are promising candidates for the above studies.…”

Behavior of optical bistability in multifold quantum dot molecules

“…The fundamental mechanism for controlling the linear and nonlinear response of the medium is quantum coherence and quantum interference. Quantum coherence and interference in multilevel atomic systems can lead to many interesting optical phenomena, such as electromagnetically induced transparency (EIT) [1,2], lasing without inversion [3,4], optical soliton [5], atom localization [6,7], giant Kerr nonlinearity [8][9][10][11][12], multi-wave mixing [13][14][15][16], controlling optical bi /multistability [17][18][19][20][21][22][23][24][25][26] and so on [27][28][29].…”