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Transient response of a single mode GaN nanowire laser

RAFID A. ABDULLAH1,*

Affiliation

  1. Medical Physics Department, University of Mosul, Mosul, Iraq

Abstract

The transient response of a single mode laser with an electrical pumping under continuous wave (CW) of a GaN nanowire laser (NWL) has been numerically investigated and analyzed. Numerical simulation results show that the GaN NWL exhibits a unique transient response behavior for both photons and carriers after being suddenly turned on with the appropriate CW bias current. A relaxation oscillation (RO) frequency in the order of a few GHz has been obtained with a huge damping rate of 5×1012 s 1 because of a short photon cavity lifetime. Few overshoots were observed in the photon transient response corresponding to this high damping rate value. The device exhibits a turn on delay and rise time on the order of 5 and 30 nanoseconds near threshold, respectively.

Keywords

GaN nanowire laser, Single-mode nanowire, Relaxation oscillation, Optical communication systems.

Citation

RAFID A. ABDULLAH, Transient response of a single mode GaN nanowire laser, Optoelectronics and Advanced Materials - Rapid Communications, 20, 9-10, September-October 2026, pp.399-404 (2026).

Submitted at: May 14, 2026

Accepted at: Oct. 5, 2026