Photon-phonon collaboratively pumped laser

Yu Fu, Fei Liang, Cheng He, Haohai Yu (), Huaijin Zhang () and Yan-Feng Chen ()
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Yu Fu: Shandong University
Fei Liang: Shandong University
Cheng He: Nanjing University
Haohai Yu: Shandong University
Huaijin Zhang: Shandong University
Yan-Feng Chen: Nanjing University

Nature Communications, 2023, vol. 14, issue 1, 1-9

Abstract: 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:YVO4 crystal, associated with the phonon-pumped population inversion under high temperatures. Moreover, an additional temperature threshold (Tth) appears besides the photon-pump power threshold (Pth), and a two-dimensional lasing phase diagram is verified with a general relation ruled by Pth = C/Tth (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.

Date: 2023
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DOI: 10.1038/s41467-023-43959-9

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