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.
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