Light-Pulse Splitting From Nano-Light-Emitting Diodes Operating in Noncarrier Injection Mode
Kun Wang, Ye Liu, Rong Chen, Chaoxing Wu, Xiongtu Zhou, Yongai Zhang, Zhiqiang Liu, Tailiang Guo
Abstract
Noncarrier injection (NCI) mode is an emerging driving mode for nanoscale light-emitting diodes (LEDs). Here, we demonstrate that a single light pulse from NCI-LEDs can be split into multiple pulses with small pulse widths that cannot be obtained by using traditional driving technology. Light-pulse splitting is achieved by using a combined signal that is a superposition of a basic signal and a signal with small amplitude and high frequency. Theoretical equations regarding the conduction current and current-pulse splitting are provided to explain light-pulse splitting theoretically. Then, light-pulse splitting is experimentally proven with a capacitor-LED-capacitor construction that is used to simulate the luminescence in NCI mode physically. Finally, we demonstrate light-pulse splitting from nanorod GaN-LEDs and discuss the working mechanisms related to electron multiple-frequency oscillation. This work can deepen the understanding of the NCI mode and provides a potential approach for advanced light-pulse-based technology.