Time-Resolved Studies of a Rolled-Up Semiconductor Microtube Laser

TL;DR

This paper investigates the dynamic lasing behavior of rolled-up GaAs quantum well microtube lasers, highlighting their fast turn-on times, short pulses, and mode red-shift during emission through time-resolved measurements.

Contribution

It provides the first detailed time-resolved analysis of rolled-up semiconductor microtube lasers, revealing their rapid lasing dynamics and mode evolution.

Findings

Fast turn-on times observed in microtube lasers

Short pulse emissions above threshold

Red-shift of laser mode during emission

Abstract

We report on lasing in rolled-up microtube resonators. Time-resolved studies on these semiconductor lasers containing GaAs quantum wells as optical gain material reveal particularly fast turn-on-times and short pulse emissions above the threshold. We observe a strong red-shift of the laser mode during the pulse emission which is compared to the time evolution of the charge-carrier density calculated by rate equations.