Ultra-short pulses with high repetition frequency in transmission plasmonic systems

TL;DR

This paper demonstrates the generation of femtosecond pulses with THz repetition frequency in a plasmonic system using quantum emitters, with controllable pulse characteristics for nano-optics applications.

Contribution

It introduces a novel plasmonic transmission system with embedded quantum emitters that produces high-repetition femtosecond pulses, explained by a semi-classical Dicke model.

Findings

Femtosecond pulses with THz repetition frequency achieved.

Pulse repetition and extinction ratio controlled by incident light and QEs density.

Potential applications in optical computing.

Abstract

Ultra-short pulses with high repetition frequency have great application prospects in the field of nano-optics. Here, in the case of continuous wave incidence, the femtosecond pulses with THz repetition frequency are achieved in the transmission system consisting of a rectangular cavity, a V-groove (VG) cavity and a nanowire embedded with quantum emitters (QEs). The generation mechanism of the ultra-short pulses with high repetition frequency is elucidated by semi-classical Dicke model. Attribute to the presence of the two-level QEs, the field amplitude in plasmonic resonator is oscillating with time, resulting in the transmittance of the system behave as the form of pulse oscillation. Moreover, The pulse repetition frequency and extinction ratio can be freely controlled by the incident light intensity and QEs number density to obtain the required ultra-short pulses at nanoscale, which also has potential applications in optical computing.