Low-threshold Colloidal Quantum Dots Polariton Lasing via a Strong Coupling Microcavity at Room Temperature

IF 5.8 3区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Nanoscale Pub Date : 2025-03-05 DOI:10.1039/d4nr05185h
Junxing Dong, Yuting Wang, Runchen Wang, Lisheng Wang, Jingzhuo Wang, Yifan Zhang, Yue Wang, Xianghu Wang, Si Shen, Hai Zhu
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Abstract

Colloidal quantum dots (CQDs) are excellent optical gain media that can be synthesized through low-cost and easily controlled techniques, holding significant promise for applications in semiconductor laser devices. In this paper, we firstly demonstrated polariton coherent lasing based on a CdSe-based CQDs microcavity device at room-temperature (RT). The dispersion behaviors of CQDs polariton with different excitation power were analyzed comprehensively using angle-resolved spectroscopy techniques. The lasing behavior at threshold of 49μJ/cm2 and energy blue-shift are well fitting with the typical characteristics of robust polariton Bose-Einstein condensation (BEC) theory. Moreover, the linewidth of polariton lasing peak is narrowed down to 0.65 nm at 1.13Pth. Additionally, the polarization characteristics and temporal dynamics of the CQDs-microcavity polariton lasing are discussed. It is noted that the lifetime of CQDs polariton during condensation was reduced from 1.3 ns (0.8 Pth) to 68 ps (1.6 Pth). Our results provide valuable insights into the strong coupling low-threshold CQDs microcavity laser at RT, and promote its practical application in further.
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来源期刊
Nanoscale
Nanoscale CHEMISTRY, MULTIDISCIPLINARY-NANOSCIENCE & NANOTECHNOLOGY
CiteScore
12.10
自引率
3.00%
发文量
1628
审稿时长
1.6 months
期刊介绍: Nanoscale is a high-impact international journal, publishing high-quality research across nanoscience and nanotechnology. Nanoscale publishes a full mix of research articles on experimental and theoretical work, including reviews, communications, and full papers.Highly interdisciplinary, this journal appeals to scientists, researchers and professionals interested in nanoscience and nanotechnology, quantum materials and quantum technology, including the areas of physics, chemistry, biology, medicine, materials, energy/environment, information technology, detection science, healthcare and drug discovery, and electronics.
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