Time-domain analysis of mode competition in ZnO nanowire lasers in inhomogeneous environments

• DOI: 10.1007/s11082-024-08001-2
• Publication Date: 2025-01-17T07:12:20Z
• Authors: Daniel Repp; Angela Barreda; Francesco Vitale; Isabelle Staude; Ulf Peschel; Carsten Ronning; Thomas Pertsch
• Keywords: Mode (computer interface)

Abstract Zinc oxide (ZnO) nanowire lasers are increasingly integrated into complex optoelectronic devices as a source of coherent radiation. To enable the rational design these devices, it is crucial to understand how both resonator and its surrounding environment influence mode competition three-dimensional structure lasing modes. Additionally, realistic models process must account for transient gain dynamics. In order investigate impact an inhomogeneous environment, composed various materials structures, on competition, we conducted Finite-Difference Time-Domain (FDTD) simulations dominant modes in different ZnO laser configurations. Our model describes key parameters such diameter, length, substrate choice affect field distribution regime. We show that metallic substrates support thin nanowires two distinct coupling regimes. Furthermore, particles attached end facets result established growth techniques significantly threshold, between counter-propagating attaching aluminum particle at facet leads threshold reduction, switching mono-directional power flow inside large segment nanowire.