Excitation-pulse intensity mediated control of coherent nonlinear optical response of a V-type system

Abstract

V-type three-level systems, where two excited states share a common ground state, serve as fundamental models for exploring coherent light-matter interactions in a range of quantum systems, from atomic gases to semiconductor nanostructures. In this work, we investigate the coherent evolution of such a system under strong femtosecond-pulse excitation by numerically solving the optical Bloch equations. Our analysis shows that the coherent evolution of a three-level system critically depends on the product of the excitation-pulse duration and energy separation between the excited states. Building on this understanding, we extend our analysis to simulate two-dimensional coherent spectra in a high-intensity regime. We demonstrate a control over the coherent pathway contributions to the nonlinear optical response of a V-type system by varying the intensity of the excitation pulses. This control is manifested through the ability to selectively turn individual spectral features on or off in the 2D spectra, each corresponding to distinct quantum pathways. Furthermore, the pulse intensities are varied to precisely adjust the phase of these peaks. Our approach provides a simple and robust framework for achieving control of coherent response of multilevel systems.

References in corpus (12)

• Quantum-Information Processing with Semiconductor Macroatoms
• Direct Measurement of Exciton Valley Coherence in Monolayer WSe${}_2$
• Control of Spin Dynamics of Excitons in Nanodots for Quantum Operations
• Quantum state measurement using coherent transients
• Coherent Excitonic Coupling in an Asymmetric Double InGaAs Quantum Well Arises from Many-Body Effects
• Coherent control of a V-type three-level system in a single quantum dot
• Multi-Wave Coherent Control of a Solid State Single Emitter
• Isolating quantum coherence with pathway-selective coherent multi-dimensional spectroscopy
• Effects of high pulse intensity and chirp in two-dimensional electronic spectroscopy of an atomic vapor
• Exploring coherence of individual excitons in InAs quantum dots embedded in natural photonic defects: influence of the excitation intensity
• Multiple Rabi rotations of trions in InGaAs quantum dots observed by photon echo spectroscopy with spatially shaped laser pulses
• Coherent Nonlinear Optical Response for High-Intensity Excitation