Generation and quantum control of giant plasmon pulses by transient quantum coherence

TL;DR

This paper introduces a quantum method for generating ultrashort, high-intensity plasmon pulses using transient quantum coherence, enabling stronger pulses with lower energy and broad applicability in nanolasers.

Contribution

The authors propose a novel quantum approach to ultrashort pulse generation leveraging transient quantum coherence, surpassing steady-state limitations and enabling control of plasmon dynamics.

Findings

Achieved generation of giant plasmon pulses with quantum control.

Demonstrated lower energy requirements for ultrashort pulse generation.

Provided insights into control mechanisms and potential applications.

Abstract

Amplified ultrashort laser pulses are useful in many fields of science and engineering. Pushing the frontiers of ultrashort pulse generation will lead to new applications in biomedical imaging, communications and sensing. We propose a new, quantum approach to ultrashort pulse generation using transient quantum coherence which predicts order of magnitude stronger pulses generated with lower input energy than in the steady-state regime, reducing the practical heating limitations. This femtosecond quantum-coherent analog of nanosecond Q-switching is not limited by the pulse duration constraints of the latter, and, in principle, may be used for a variety of lasers including x-ray and plasmon nanolasers. We apply this approach to generation of giant plasmon pulses and achieve quantum control of plasmon relaxation dynamics by varying the drive pulse delay, amplitude and duration. We provide insights into the control mechanisms, and discuss future implementations and applications of this new source of ultrashort nanooptical fields.