光子-声子协同泵浦激光器

Photon-phonon collaboratively pumped laser.

作者信息

Fu Yu, Liang Fei, He Cheng, Yu Haohai, Zhang Huaijin, Chen Yan-Feng

机构信息

State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan, China.

National Laboratory of Solid State Microstructures & Department of Materials Science and Engineering, Nanjing University, Nanjing, China.

出版信息

Nat Commun. 2023 Dec 7;14(1):8110. doi: 10.1038/s41467-023-43959-9.

DOI:10.1038/s41467-023-43959-9

PMID:38062008

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10703827/

Abstract

In 1917, Einstein considered stimulated photon emission of electron radiation, offering the theoretical foundation for laser, technically achieved in 1960. However, thermal phonons along with heat creation of non-radiative transition, are ineffective, even playing a detrimental role in lasing efficiency. Here, we realize a photon-phonon collaboratively pumped laser enhanced by heat in a counterintuitive way. We observe a laser transition from phonon-free 1064 nm lasing to phonon-pumped 1176 nm lasing in Nd:YVO crystal, associated with the phonon-pumped population inversion under high temperatures. Moreover, an additional temperature threshold (T) appears besides the photon-pump power threshold (P), and a two-dimensional lasing phase diagram is verified with a general relation ruled by P = C/T (constant C upon loss for a given crystal), similar to Curie's Law. Our strategy will promote the study of laser physics via dimension extension, searching for highly efficient and low-threshold laser devices via this temperature degree of freedom.

摘要

1917年，爱因斯坦考虑了电子辐射的受激光子发射，为1960年在技术上实现的激光提供了理论基础。然而，热声子以及非辐射跃迁产生的热量是无效的，甚至对激光效率起有害作用。在此，我们以一种违反直觉的方式实现了一种由热协同泵浦增强的光子-声子激光器。我们在钕钇钒酸盐（Nd:YVO）晶体中观察到从无声子的1064纳米激光跃迁到声子泵浦的1176纳米激光，这与高温下声子泵浦的粒子数反转有关。此外，除了光子泵浦功率阈值（P）之外还出现了一个额外的温度阈值（T），并且通过由P = C/T（给定晶体在损耗情况下的常数C）所支配的一般关系验证了二维激光相图，这类似于居里定律。我们的策略将通过维度扩展推动激光物理学的研究，通过这个温度自由度来寻找高效和低阈值的激光器件。