Biexciton-mediated modulation response of colloidal quantum dots deposited on a silicon nitride waveguide at high laser excitation rate

摘要

We develop a sensitive collinear pump-probe technique to resolve small amplitude and phase modulations of laser pulses in hybrid PbS/CdS-quantum-dot-SiN waveguides. It shows that at high excitation rate biexciton creation governs the optical interaction.