Gaussian and sinc shaped few-cycle pulse driven ultrafast coherent population transfer in lambda- like atomic systems

TL;DR

This paper introduces a robust, efficient method for ultrafast coherent population transfer in lambda-like atomic systems using specially shaped few-cycle laser pulses, outperforming traditional techniques like STIRAP.

Contribution

The study proposes a novel scheme employing Gaussian and sinc-shaped few-cycle pulses for rapid CPT, requiring less pulse area and showing robustness against parameter variations.

Findings

Achieves efficient population transfer with fewer pulse area.

Demonstrates robustness against laser parameter variations.

Outperforms traditional STIRAP in speed and efficiency.

Abstract

We report and propose a simple scheme to achieve efficient and fast coherent population transfer (CPT) by utilizing either a nonlinearly chirped Gaussian shaped few-cycle laser pulse or an unchirped sinc-shaped few-cycle laser pulse. The proposed scheme is shown to be fairly robust against the variation of the laser parameters such as temporal pulse width, chirp rates, carrier envelope phases and Rabi frequencies. We find that compared to the so-called stimulated Raman adiabatic passage (STIRAP) technique, our scheme for complete population transfer with few-cycle Gaussian shaped laser pulses requires less pulse area.