Photoluminescence of CH₃NH₃PbCl₃ single crystals under multiphoton excitation is studied. The emission intensity and wavelength, which are related to the phase of the single crystals, are found to be dependent on the operating temperature and pressure. High optical gain (>110 cm⁻¹ @ ≈395 nm) and high absorption coefficient (≈9 × 10⁻¹⁰ cm⁹ GW⁻⁵ @ 2400 nm) can also be obtained from the single crystals. With suitable design of the resonant optical amplification, lasing emission at ≈395 nm is demonstrated from the single‐crystal microcavities under 2400 nm excitation. Hence, it is verified that CH₃NH₃PbCl₃ single crystals can offer new opportunities for novel nonlinear photonics applications.

中文翻译：

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多光子激发下CH3NH3PbCl3单晶微腔的激光发射特性

研究了CH ₃ NH ₃ PbCl ₃单晶在多光子激发下的光致发光。发现与单晶的相位有关的发射强度和波长取决于工作温度和压力。也可以从单晶获得高光学增益（> 110 cm ^-1 @≈395nm）和高吸收系数（≈9×10 ^-10 cm ⁹ GW ^-5 @ 2400 nm）。通过适当设计谐振光学放大，可以在2400 nm激发下从单晶微腔中证明≈395nm的激光发射。因此，证实了CH ₃ NH ₃ PbCl_3种单晶可以为新型非线性光子学应用提供新的机会。