Effective super-bandwidth in laser pulses

TL;DR

This paper provides a theoretical analysis of super-oscillatory laser pulses interacting with a two-level quantum system, highlighting increased effective bandwidth and potential for advanced laser-matter interaction applications.

Contribution

It introduces the concept of effective super-bandwidth in super-oscillatory pulses and analyzes its implications for laser-matter interactions.

Findings

Increased effective bandwidth in super-oscillatory regions.

High efficiency of central super-oscillatory region.

Potential for new experimental applications.

Abstract

We present here a theoretical analysis of the interaction between an ideal two-level quantum system and a super-oscillatory pulse, like the one proposed and successfully synthesized in https://doi.org/10.1088/2040-8986/abfedf and arXiv:2106.09192. As a prominent feature, these pulses present a high efficiency of the central super-oscillatory region in relation to the unavoidable side-lobes. Besides, our study shows an increase of the effective bandwidth of the pulse, in the super-oscillatory region, and not only the appearance of a local frequency higher than its highest Fourier-frequency component, as in the usual description of the phenomenon of super-oscillations. Beyond introducing the concept of effective super-bandwidth, the presented results could be relevant for experimental applications and opening new perspectives for laser-matter interaction.