Deciphering the photophysical properties of near-infrared quantum emitters in AlGaN films by transition dynamics
Source abstract
Abstract
Point defects in wide bandgap III-nitride semiconductors have been recently reported to be one kind of the most promising near-infrared (NIR) quantum emitters operating at room temperature (RT). But the identification of the point defect species and the energy level structures as well as the transition dynamics remain unclear. Here, the photophysical properties of single-photon emission from point defects in AlGaN films are investigated in detail. According to the first-principles calculations, a three-level model was established to explain the transition dynamics of the quantum emitters. An anti-site nitrogen vacancy complex (VNNGa) was demonstrated to be the most likely origin of the measured emitter since the calculated zero-phonon line (ZPL) and the lifetime of VNNGa in the AlGaN film coincide well with the experimental results. Our results provide new insights into the optical properties and energy level structures of quantum emission from point defects in AlGaN films at RT and establish the foundation for future AlGaN-based on-chip quantum technologies.
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Research context
OpenAlex topics: Media and Digital Communication · Social Sciences and Policies · Educational theories and practices
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Affiliations
State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200241, China
Microsystem and Terahertz Research Center, China Academy of Engineering Physics, Chengdu, 610299, China
College of Physics, Sichuan University, Chengdu, Sichuan 610065, China
School of Electronics Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China
Chongqing Key Laboratory of Precision Optics, Chongqing Institute of East China Normal University, Chongqing 401120, China
Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China
Funding
National Key Research and Development Program of China · National Natural Science Foundation of China · Natural Science Foundation of Shanghai · Science Challenge Project · Fundamental Research Funds for the Central Universities · East China Normal University
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